Vulnerability-Lookup

GHSA-CGRX-MC8F-2PRM

Vulnerability from github – Published: 2025-11-05 18:40 – Updated: 2025-11-18 18:38

Summary

runc container escape and denial of service due to arbitrary write gadgets and procfs write redirects

Details

Impact

This attack is primarily a more sophisticated version of CVE-2019-19921, which was a flaw which allowed an attacker to trick runc into writing the LSM process labels for a container process into a dummy tmpfs file and thus not apply the correct LSM labels to the container process. The mitigation runc applied for CVE-2019-19921 was fairly limited and effectively only caused runc to verify that when runc writes LSM labels that those labels are actual procfs files.

Rather than using a fake tmpfs file for /proc/self/attr/<label>, an attacker could instead (through various means) make /proc/self/attr/<label> reference a real procfs file, but one that would still be a no-op (such as /proc/self/sched). This would have the same effect but would clear the "is a procfs file" check. Runc is aware that this kind of attack would be possible (even going so far as to discuss this publicly as "future work" at conferences), and runc is working on a far more comprehensive mitigation of this attack, but this security issue was disclosed before runc could complete this work.

In all known versions of runc, an attacker can trick runc into misdirecting writes to /proc to other procfs files through the use of a racing container with shared mounts (runc has also verified this attack is possible to exploit using a standard Dockerfile with docker buildx build as that also permits triggering parallel execution of containers with custom shared mounts configured). This redirect could be through symbolic links in a tmpfs or theoretically other methods such as regular bind-mounts.

Note that while /proc/self/attr/<label> was the example used above (which is LSM-specific), this issue affect all writes to /proc in runc and thus also affects sysctls (written to /proc/sys/...) and some other APIs.

Additional Impacts

While investigating this issue, runc discovered that another risk with these redirected writes is that they could be redirected to dangerous files such as /proc/sysrq-trigger rather than just no-op files like /proc/self/sched. For instance, the default AppArmor profile name in Docker is docker-default, which when written to /proc/sysrq-trigger would cause the host system to crash.

When this was discovered, runc conducted an audit of other write operations within runc and found several possible areas where runc could be used as a semi-arbitrary write gadget when combined with the above race attacks. The most concerning attack scenario was the configuration of sysctls. Because the contents of the sysctl are free-form text, an attacker could use a misdirected write to write to /proc/sys/kernel/core_pattern and break out of the container (as described in CVE-2025-31133, kernel upcalls are not namespaced and so coredump helpers will run with complete root privileges on the host). Even if the attacker cannot configure custom sysctls, a valid sysctl string (when redirected to /proc/sysrq-trigger) can easily cause the machine to hang.

Note that the fact that this attack allows you to disable LSM labels makes it a very useful attack to combine with CVE-2025-31133 (as one of the only mitigations available to most users for that issue is AppArmor, and this attack would let you bypass that). However, the misdirected write issue above means that you could also achieve most of the same goals without needing to chain together attacks.

Patches

This advisory is being published as part of a set of three advisories:

CVE-2025-31133
CVE-2025-52881
CVE-2025-52565

The patches fixing this issue have accordingly been combined into a single patchset. The following patches from that patchset resolve the issues in this advisory:

db19bbed5348 ("internal/sys: add VerifyInode helper")
6fc191449109 ("internal: move utils.MkdirAllInRoot to internal/pathrs")
ff94f9991bd3 ("*: switch to safer securejoin.Reopen")
44a0fcf685db ("go.mod: update to github.com/cyphar/filepath-securejoin@v0.5.0")
77889b56db93 ("internal: add wrappers for securejoin.Proc*")
fdcc9d3cad2f ("apparmor: use safe procfs API for labels")
ff6fe1324663 ("utils: use safe procfs for /proc/self/fd loop code")
b3dd1bc562ed ("utils: remove unneeded EnsureProcHandle")
77d217c7c377 ("init: write sysctls using safe procfs API")
435cc81be6b7 ("init: use securejoin for /proc/self/setgroups")
d61fd29d854b ("libct/system: use securejoin for /proc/$pid/stat")
4b37cd93f86e ("libct: align param type for mountCgroupV1/V2 functions")
d40b3439a961 ("rootfs: switch to fd-based handling of mountpoint targets")
ed6b1693b8b3 ("selinux: use safe procfs API for labels")
Please note that this patch includes a private patch for github.com/opencontainers/selinux that could not be made public through a public pull request (as it would necessarily disclose this embargoed security issue).

The patch includes a complete copy of the forked code and a replace directive (as well as go mod vendor applied), which should still work with downstream build systems. If you cannot apply this patch, you can safely drop it -- some of the other patches in this series should block these kinds of racing mount attacks entirely.

See https://github.com/opencontainers/selinux/pull/237 for the upstream patch. * 3f925525b44d ("rootfs: re-allow dangling symlinks in mount targets") * a41366e74080 ("openat2: improve resilience on busy systems")

runc 1.2.8, 1.3.3, and 1.4.0-rc.3 have been released and all contain fixes for these issues. As per runc's new release model, runc 1.1.x and earlier are no longer supported and thus have not been patched.

Mitigations

Do not run untrusted container images from unknown or unverified sources.
For the basic no-op attack, this attack allows a container process to run with the same LSM labels as runc. For most AppArmor deployments this means it will be unconfined, and for SELinux it will likely be container_runtime_t. Runc has not conducted in-depth testing of the impact on SELinux -- it is possible that it provides some reasonable protection but it seems likely that an attacker could cause harm to systems even with such an SELinux setup.
For the more involved redirect and write gadget attacks, unfortunately most LSM profiles (including the standard container-selinux profiles) provide the container runtime access to sysctl files (including /proc/sysrq-trigger) and so LSMs likely do not provide much protection against these attacks.
Using rootless containers provides some protection against these kinds of bugs (privileged writes in runc being redirected) -- by having runc itself be an unprivileged process, in general you would expect the impact scope of a runc bug to be less severe as it would only have the privileges afforded to the host user which spawned runc. For this particular bug, the privilege escalation caused by the inadvertent write issue is entirely mitigated with rootless containers because the unprivileged user that the runc process is executing as cannot write to the aforementioned procfs files (even intentionally).

Other Runtimes

As this vulnerability boils down to a fairly easy-to-make logic bug, runc has provided information to other OCI (crun, youki) and non-OCI (LXC) container runtimes about this vulnerability.

Based on discussions with other runtimes, it seems that crun and youki may have similar security issues and will release a co-ordinated security release along with runc. LXC appears to use the host's /proc for all procfs operations, and so is likely not vulnerable to this issue (this is a trade-off -- runc uses the container's procfs to avoid CVE-2016-9962-style attacks).

Credits

Thanks to Li Fubang (@lifubang from acmcoder.com, CIIC) and Tõnis Tiigi (@tonistiigi from Docker) for both independently discovering this vulnerability, as well as Aleksa Sarai (@cyphar from SUSE) for the original research into this class of security issues and solutions.

Additional thanks go to Tõnis Tiigi for finding some very useful exploit templates for these kinds of race attacks using docker buildx build.

Severity ?

7.3 (High)


                  
                    CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.2.7"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/opencontainers/runc"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.2.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.12.0"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/opencontainers/selinux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.13.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.3.2"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/opencontainers/runc"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.3.0-rc.1"
            },
            {
              "fixed": "1.3.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.4.0-rc.2"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/opencontainers/runc"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.4.0-rc.1"
            },
            {
              "fixed": "1.4.0-rc.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-52881"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-363",
      "CWE-61"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-11-05T18:40:40Z",
    "nvd_published_at": "2025-11-06T21:15:42Z",
    "severity": "HIGH"
  },
  "details": "### Impact ###\n\nThis attack is primarily a more sophisticated version of CVE-2019-19921, which was a flaw which allowed an attacker to trick runc into writing the LSM process labels for a container process into a dummy `tmpfs` file and thus not apply the correct LSM labels to the container process. The mitigation runc applied for CVE-2019-19921 was fairly limited and effectively only caused runc to verify that when runc writes LSM labels that those labels are actual procfs files.\n\nRather than using a fake `tmpfs` file for `/proc/self/attr/\u003clabel\u003e`, an attacker could instead (through various means) make `/proc/self/attr/\u003clabel\u003e` reference a real `procfs` file, but one that would still be a no-op (such as `/proc/self/sched`). This would have the same effect but would clear the \"is a procfs file\" check. Runc is aware that this kind of attack would be possible (even going so far as to discuss this publicly as \"future work\" at conferences), and runc is working on a far more comprehensive mitigation of this attack, but this security issue was disclosed before runc could complete this work.\n\nIn all known versions of runc, an attacker can trick runc into misdirecting writes to `/proc` to other procfs files through the use of a racing container with shared mounts (runc has also verified this attack is possible to exploit using a standard Dockerfile with `docker buildx build` as that also permits triggering parallel execution of containers with custom shared mounts configured). This redirect could be through symbolic links in a `tmpfs` or theoretically other methods such as regular bind-mounts.\n\nNote that while `/proc/self/attr/\u003clabel\u003e` was the example used above (which is LSM-specific), this issue affect all writes to `/proc` in runc and thus also affects sysctls (written to `/proc/sys/...`) and some other APIs.\n\n#### Additional Impacts ####\n\nWhile investigating this issue, runc discovered that another risk with these redirected writes is that they could be redirected to dangerous files such as `/proc/sysrq-trigger` rather than just no-op files like `/proc/self/sched`. For instance, the default AppArmor profile name in Docker is `docker-default`, which when written to `/proc/sysrq-trigger` would cause the host system to crash.\n\nWhen this was discovered, runc conducted an audit of other write operations within runc and found several possible areas where runc could be used as a semi-arbitrary write gadget when combined with the above race attacks. The most concerning attack scenario was the configuration of sysctls. Because the contents of the sysctl are free-form text, an attacker could use a misdirected write to write to `/proc/sys/kernel/core_pattern` and break out of the container (as described in CVE-2025-31133, kernel upcalls are not namespaced and so coredump helpers will run with complete root privileges on the host). Even if the attacker cannot configure custom sysctls, a valid sysctl string (when redirected to `/proc/sysrq-trigger`) can easily cause the machine to hang.\n\nNote that the fact that this attack allows you to disable LSM labels makes it a very useful attack to combine with CVE-2025-31133 (as one of the only mitigations available to most users for that issue is AppArmor, and this attack would let you bypass that). However, the misdirected write issue above means that you could also achieve most of the same goals without needing to chain together attacks.\n\n### Patches ###\n\nThis advisory is being published as part of a set of three advisories:\n\n  * CVE-2025-31133\n  * CVE-2025-52881\n  * CVE-2025-52565\n\nThe patches fixing this issue have accordingly been combined into a single patchset. The following patches from that patchset resolve the issues in this advisory:\n\n * db19bbed5348 (\"internal/sys: add VerifyInode helper\")\n * 6fc191449109 (\"internal: move utils.MkdirAllInRoot to internal/pathrs\")\n * ff94f9991bd3 (\"*: switch to safer securejoin.Reopen\")\n * 44a0fcf685db (\"go.mod: update to github.com/cyphar/filepath-securejoin@v0.5.0\")\n * 77889b56db93 (\"internal: add wrappers for securejoin.Proc*\")\n * fdcc9d3cad2f (\"apparmor: use safe procfs API for labels\")\n * ff6fe1324663 (\"utils: use safe procfs for /proc/self/fd loop code\")\n * b3dd1bc562ed (\"utils: remove unneeded EnsureProcHandle\")\n * 77d217c7c377 (\"init: write sysctls using safe procfs API\")\n * 435cc81be6b7 (\"init: use securejoin for /proc/self/setgroups\")\n * d61fd29d854b (\"libct/system: use securejoin for /proc/$pid/stat\")\n * 4b37cd93f86e (\"libct: align param type for mountCgroupV1/V2 functions\")\n * d40b3439a961 (\"rootfs: switch to fd-based handling of mountpoint targets\")\n * ed6b1693b8b3 (\"selinux: use safe procfs API for labels\")\n   - Please note that this patch includes a private patch for `github.com/opencontainers/selinux` that could not be made public through a public pull request (as it would necessarily disclose this embargoed security issue).\n\n     The patch includes a complete copy of the forked code and a `replace` directive (as well as `go mod vendor` applied), which should still work with downstream build systems. If you cannot apply this patch, you can safely drop it -- some of the other patches in this series should block these kinds of racing mount attacks entirely.\n\n     See https://github.com/opencontainers/selinux/pull/237 for the upstream patch.\n * 3f925525b44d (\"rootfs: re-allow dangling symlinks in mount targets\")\n * a41366e74080 (\"openat2: improve resilience on busy systems\")\n\nrunc 1.2.8, 1.3.3, and 1.4.0-rc.3 have been released and all contain fixes for these issues. As per [runc\u0027s new release model][RELEASES.md], runc 1.1.x and earlier are no longer supported and thus have not been patched.\n\n[CVE-2025-31133]: https://github.com/opencontainers/runc/security/advisories/GHSA-9493-h29p-rfm2\n[CVE-2025-52565]: https://github.com/opencontainers/runc/security/advisories/GHSA-qw9x-cqr3-wc7r\n[CVE-2025-52881]: https://github.com/opencontainers/runc/security/advisories/GHSA-cgrx-mc8f-2prm\n[RELEASES.md]: https://github.com/opencontainers/runc/blob/v1.4.0-rc.2/RELEASES.md\n\n### Mitigations ###\n\n * Do not run untrusted container images from unknown or unverified sources.\n\n * For the basic no-op attack, this attack allows a container process to run with the same LSM labels as `runc`. For most AppArmor deployments this means it will be `unconfined`, and for SELinux it will likely be `container_runtime_t`. Runc has not conducted in-depth testing of the impact on SELinux -- it is possible that it provides some reasonable protection but it seems likely that an attacker could cause harm to systems even with such an SELinux setup.\n\n * For the more involved redirect and write gadget attacks, unfortunately most LSM profiles (including the standard container-selinux profiles) provide the container runtime access to sysctl files (including `/proc/sysrq-trigger`) and so LSMs likely do not provide much protection against these attacks.\n\n * Using rootless containers provides some protection against these kinds of bugs (privileged writes in runc being redirected) -- by having runc itself be an unprivileged process, in general you would expect the impact scope of a runc bug to be less severe as it would only have the privileges afforded to the host user which spawned runc. For this particular bug, the privilege escalation caused by the inadvertent write issue is entirely mitigated with rootless containers because the unprivileged user that the `runc` process is executing as cannot write to the aforementioned procfs files (even intentionally).\n\n### Other Runtimes ###\n\nAs this vulnerability boils down to a fairly easy-to-make logic bug, runc has provided information to other OCI (crun, youki) and non-OCI (LXC) container runtimes about this vulnerability.\n\nBased on discussions with other runtimes, it seems that crun and youki may have similar security issues and will release a co-ordinated security release along with runc. LXC appears to use the host\u0027s `/proc` for all procfs operations, and so is likely not vulnerable to this issue (this is a trade-off -- runc uses the container\u0027s procfs to avoid CVE-2016-9962-style attacks).\n\n[CVE-2016-9962]: https://seclists.org/fulldisclosure/2017/Jan/21\n\n### Credits ###\n\nThanks to Li Fubang (@lifubang from acmcoder.com, CIIC) and T\u00f5nis Tiigi (@tonistiigi from Docker) for both independently discovering this vulnerability, as well as Aleksa Sarai (@cyphar from SUSE) for the original research into this class of security issues and solutions.\n\nAdditional thanks go to T\u00f5nis Tiigi for finding some very useful exploit templates for these kinds of race attacks using `docker buildx build`.",
  "id": "GHSA-cgrx-mc8f-2prm",
  "modified": "2025-11-18T18:38:01Z",
  "published": "2025-11-05T18:40:40Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/security/advisories/GHSA-qw9x-cqr3-wc7r"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/security/advisories/GHSA-fh74-hm69-rqjw"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/security/advisories/GHSA-cgrx-mc8f-2prm"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/security/advisories/GHSA-9493-h29p-rfm2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-52881"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/selinux/pull/237"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/commit/ff94f9991bd32076c871ef0ad8bc1b763458e480"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/commit/ff6fe1324663538167eca8b3d3eec61e1bd4fa51"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/commit/fdcc9d3cad2f85954a241ccb910a61aaa1ef47f3"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/commit/ed6b1693b8b3ae7eb0250a7e76fc888cdacf98c1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/commit/db19bbed5348847da433faa9d69e9f90192bfa64"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/commit/d61fd29d854b416feaaf128bf650325cd2182165"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/commit/d40b3439a9614a86e87b81a94c6811ec6fa2d7d2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/commit/b3dd1bc562ed9996d1a0f249e056c16624046d28"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/commit/a41366e74080fa9f26a2cd3544e2801449697322"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/commit/77d217c7c3775d8ca5af89e477e81568ef4572db"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/commit/77889b56db939c323d29d1130f28f9aea2edb544"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/commit/6fc191449109ea14bb7d61238f24a33fe08c651f"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/commit/4b37cd93f86e72feac866442988b549b5b7bf3e6"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/commit/44a0fcf685db051c80b8c269812bb177f5802c58"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/commit/435cc81be6b79cdec73b4002c0dae549b2f6ae6d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/commit/3f925525b44d247e390e529e772a0dc0c0bc3557"
    },
    {
      "type": "WEB",
      "url": "https://youtu.be/tGseJW_uBB8"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/github.com/cyphar/filepath-securejoin/pathrs-lite/procfs"
    },
    {
      "type": "WEB",
      "url": "https://youtu.be/y1PaBzxwRWQ"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/selinux/releases/tag/v1.13.0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/opencontainers/runc/blob/v1.4.0-rc.2/RELEASES.md"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/opencontainers/runc"
    },
    {
      "type": "WEB",
      "url": "http://github.com/opencontainers/runc/commit/a41366e74080fa9f26a2cd3544e2801449697322"
    },
    {
      "type": "WEB",
      "url": "http://github.com/opencontainers/runc/commit/fdcc9d3cad2f85954a241ccb910a61aaa1ef47f3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
      "type": "CVSS_V4"
    }
  ],
  "summary": "runc container escape and denial of service due to arbitrary write gadgets and procfs write redirects"
}

GHSA-J5W8-Q4QC-RX2X

Vulnerability from github – Published: 2025-11-19 23:01 – Updated: 2025-11-19 23:01

Summary

golang.org/x/crypto/ssh allows an attacker to cause unbounded memory consumption

Details

SSH servers parsing GSSAPI authentication requests do not validate the number of mechanisms specified in the request, allowing an attacker to cause unbounded memory consumption.

Severity ?

5.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "golang.org/x/crypto"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.45.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-58181"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-11-19T23:01:20Z",
    "nvd_published_at": "2025-11-19T21:15:50Z",
    "severity": "MODERATE"
  },
  "details": "SSH servers parsing GSSAPI authentication requests do not validate the number of mechanisms specified in the request, allowing an attacker to cause unbounded memory consumption.",
  "id": "GHSA-j5w8-q4qc-rx2x",
  "modified": "2025-11-19T23:01:20Z",
  "published": "2025-11-19T23:01:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-58181"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/cl/721961"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/issue/76363"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/golang-announce/c/w-oX3UxNcZA"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2025-4134"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "golang.org/x/crypto/ssh allows an attacker to cause unbounded memory consumption"
}

GHSA-VVGC-356P-C3XW

Vulnerability from github – Published: 2025-04-16 19:22 – Updated: 2025-05-17 18:49

Summary

golang.org/x/net vulnerable to Cross-site Scripting

Details

The tokenizer incorrectly interprets tags with unquoted attribute values that end with a solidus character (/) as self-closing. When directly using Tokenizer, this can result in such tags incorrectly being marked as self-closing, and when using the Parse functions, this can result in content following such tags as being placed in the wrong scope during DOM construction, but only when tags are in foreign content (e.g. , , etc contexts).

Severity ?

5.3 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "golang.org/x/net"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.38.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-22872"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-04-16T19:22:51Z",
    "nvd_published_at": "2025-04-16T18:16:04Z",
    "severity": "MODERATE"
  },
  "details": "The tokenizer incorrectly interprets tags with unquoted attribute values that end with a solidus character (/) as self-closing. When directly using Tokenizer, this can result in such tags incorrectly being marked as self-closing, and when using the Parse functions, this can result in content following such tags as being placed in the wrong scope during DOM construction, but only when tags are in foreign content (e.g. \u003cmath\u003e, \u003csvg\u003e, etc contexts).",
  "id": "GHSA-vvgc-356p-c3xw",
  "modified": "2025-05-17T18:49:25Z",
  "published": "2025-04-16T19:22:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22872"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/cl/662715"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/issue/73070"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/golang-announce/c/ezSKR9vqbqA"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2025-3595"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20250516-0007"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "golang.org/x/net vulnerable to Cross-site Scripting"
}

GHSA-F6X5-JH6R-WRFV

Vulnerability from github – Published: 2025-11-19 23:16 – Updated: 2025-11-20 16:35

Summary

golang.org/x/crypto/ssh/agent vulnerable to panic if message is malformed due to out of bounds read

Details

SSH Agent servers do not validate the size of messages when processing new identity requests, which may cause the program to panic if the message is malformed due to an out of bounds read.

Severity ?

5.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "golang.org/x/crypto"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.45.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-47914"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-11-19T23:16:40Z",
    "nvd_published_at": "2025-11-19T21:15:50Z",
    "severity": "MODERATE"
  },
  "details": "SSH Agent servers do not validate the size of messages when processing new identity requests, which may cause the program to panic if the message is malformed due to an out of bounds read.",
  "id": "GHSA-f6x5-jh6r-wrfv",
  "modified": "2025-11-20T16:35:18Z",
  "published": "2025-11-19T23:16:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-47914"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/cl/721960"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/issue/76364"
    },
    {
      "type": "WEB",
      "url": "https://go.googlesource.com/crypto"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/golang-announce/c/w-oX3UxNcZA"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2025-4135"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "golang.org/x/crypto/ssh/agent vulnerable to panic if message is malformed due to out of bounds read"
}

CVE-2025-61727 (GCVE-0-2025-61727)

Vulnerability from cvelistv5 – Published: 2025-12-03 19:37 – Updated: 2025-12-03 22:06

Title

Improper application of excluded DNS name constraints when verifying wildcard names in crypto/x509

Summary

An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. For example a constraint that excludes the subdomain test.example.com does not prevent a leaf certificate from claiming the SAN *.example.com.

Severity ?

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CWE

CWE-295 - Improper Certificate Validation

Assigner

Go

References

URL

Tags

	https://go.dev/cl/723900
	https://go.dev/issue/76442
	https://groups.google.com/g/golang-announce/c/8FJ…
	https://pkg.go.dev/vuln/GO-2025-4175

Impacted products

	Vendor	Product	Version
	Go standard library	crypto/x509	Affected: 0 , < 1.24.11 (semver) Affected: 1.25.0 , < 1.25.5 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 6.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-61727",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-03T22:06:13.958433Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-12-03T22:06:17.007Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "crypto/x509",
          "product": "crypto/x509",
          "programRoutines": [
            {
              "name": "Certificate.Verify"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.24.11",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.25.5",
              "status": "affected",
              "version": "1.25.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. For example a constraint that excludes the subdomain test.example.com does not prevent a leaf certificate from claiming the SAN *.example.com."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-295: Improper Certificate Validation",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-03T19:37:15.054Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/cl/723900"
        },
        {
          "url": "https://go.dev/issue/76442"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/8FJoBkPddm4"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2025-4175"
        }
      ],
      "title": "Improper application of excluded DNS name constraints when verifying wildcard names in crypto/x509"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2025-61727",
    "datePublished": "2025-12-03T19:37:15.054Z",
    "dateReserved": "2025-09-30T15:05:03.605Z",
    "dateUpdated": "2025-12-03T22:06:17.007Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-39817 (GCVE-0-2026-39817)

Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-05-08 21:29

Title

Invoking "go tool pack" does not sanitize output paths in cmd/go

Summary

The "go tool pack" subcommand (usually used only by the compiler as an internal tool with known-good inputs) does not sanitize output filenames. Extracting a malicious archive file with the "pack" subcommand can write files to arbitrary locations on the filesystem.

Severity ?

5.9 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

Go

References

URL

Tags

	https://go.dev/issue/78778
	https://go.dev/cl/767520
	https://groups.google.com/g/golang-announce/c/qcC…
	https://pkg.go.dev/vuln/GO-2026-4979

Impacted products

	Vendor	Product	Version
	Go toolchain	cmd/go	Affected: 0 , < 1.25.10 (semver) Affected: 1.26.0-0 , < 1.26.3 (semver)

Credits

Harshit Gupta (Mr HAX)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "NONE",
              "baseScore": 5.9,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "CHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-39817",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-08T16:58:23.255142Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-08T21:29:47.246Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "cmd/go",
          "product": "cmd/go",
          "vendor": "Go toolchain",
          "versions": [
            {
              "lessThan": "1.25.10",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.26.3",
              "status": "affected",
              "version": "1.26.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Harshit Gupta (Mr HAX)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The \"go tool pack\" subcommand (usually used only by the compiler as an internal tool with known-good inputs) does not sanitize output filenames. Extracting a malicious archive file with the \"pack\" subcommand can write files to arbitrary locations on the filesystem."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-07T19:41:18.993Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/78778"
        },
        {
          "url": "https://go.dev/cl/767520"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-4979"
        }
      ],
      "title": "Invoking \"go tool pack\" does not sanitize output paths in cmd/go"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-39817",
    "datePublished": "2026-05-07T19:41:18.993Z",
    "dateReserved": "2026-04-07T18:13:03.524Z",
    "dateUpdated": "2026-05-08T21:29:47.246Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2022-46146 (GCVE-0-2022-46146)

Vulnerability from cvelistv5 – Published: 2022-11-29 00:00 – Updated: 2024-08-03 14:24

Title

Prometheus Exporter Toolkit vulnerable to basic authentication bypass

Summary

Prometheus Exporter Toolkit is a utility package to build exporters. Prior to versions 0.7.2 and 0.8.2, if someone has access to a Prometheus web.yml file and users' bcrypted passwords, they can bypass security by poisoning the built-in authentication cache. Versions 0.7.2 and 0.8.2 contain a fix for the issue. There is no workaround, but attacker must have access to the hashed password to use this functionality.

Severity ?

6.2 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE

CWE-303 - Incorrect Implementation of Authentication Algorithm
CWE-287 - Improper Authentication

Assigner

GitHub_M

References

URL

Tags

	https://github.com/prometheus/exporter-toolkit/se…
	https://github.com/prometheus/exporter-toolkit/co…
	http://www.openwall.com/lists/oss-security/2022/11/29/1	mailing-list
	http://www.openwall.com/lists/oss-security/2022/11/29/2	mailing-list
	http://www.openwall.com/lists/oss-security/2022/11/29/4	mailing-list
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
	https://security.gentoo.org/glsa/202401-15	vendor-advisory

Impacted products

	Vendor	Product	Version
	prometheus	exporter-toolkit	Affected: < 0.7.2 Affected: >= 0.8.0, < 0.8.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T14:24:03.295Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/prometheus/exporter-toolkit/security/advisories/GHSA-7rg2-cxvp-9p7p"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/prometheus/exporter-toolkit/commit/5b1eab34484ddd353986bce736cd119d863e4ff5"
          },
          {
            "name": "[oss-security] 20221129 CVE-2022-46146 in Prometheus\u0027 exporter toolkit: bypass basic authentication",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2022/11/29/1"
          },
          {
            "name": "[oss-security] 20221129 Re: CVE-2022-46146 in Prometheus\u0027 exporter toolkit: bypass basic authentication",
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              "mailing-list",
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            "url": "http://www.openwall.com/lists/oss-security/2022/11/29/2"
          },
          {
            "name": "[oss-security] 20221129 Re: CVE-2022-46146 in Prometheus\u0027 exporter toolkit: bypass basic authentication",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2022/11/29/4"
          },
          {
            "name": "FEDORA-2023-cf176d02d8",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ULVDTAI76VATRAHTKCE2SUJ4NC3PQZ6Y/"
          },
          {
            "name": "FEDORA-2023-1b25579262",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JRSHISR64L6QGSMDFZDNPHHIXSCAKK26/"
          },
          {
            "name": "FEDORA-2023-c1318fb7f8",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UH24VXIB25OGHF4VGY4PLZMTGTI3BHCA/"
          },
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            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202401-15"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "exporter-toolkit",
          "vendor": "prometheus",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.7.2"
            },
            {
              "status": "affected",
              "version": "\u003e= 0.8.0, \u003c 0.8.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Prometheus Exporter Toolkit is a utility package to build exporters. Prior to versions 0.7.2 and 0.8.2, if someone has access to a Prometheus web.yml file and users\u0027 bcrypted passwords, they can bypass security by poisoning the built-in authentication cache. Versions 0.7.2 and 0.8.2 contain a fix for the issue. There is no workaround, but attacker must have access to the hashed password to use this functionality."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 6.2,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-303",
              "description": "CWE-303: Incorrect Implementation of Authentication Algorithm",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-287",
              "description": "CWE-287: Improper Authentication",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-01-12T12:06:19.456Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
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          "url": "https://github.com/prometheus/exporter-toolkit/security/advisories/GHSA-7rg2-cxvp-9p7p"
        },
        {
          "url": "https://github.com/prometheus/exporter-toolkit/commit/5b1eab34484ddd353986bce736cd119d863e4ff5"
        },
        {
          "name": "[oss-security] 20221129 CVE-2022-46146 in Prometheus\u0027 exporter toolkit: bypass basic authentication",
          "tags": [
            "mailing-list"
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          "url": "http://www.openwall.com/lists/oss-security/2022/11/29/1"
        },
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          "name": "[oss-security] 20221129 Re: CVE-2022-46146 in Prometheus\u0027 exporter toolkit: bypass basic authentication",
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        },
        {
          "name": "[oss-security] 20221129 Re: CVE-2022-46146 in Prometheus\u0027 exporter toolkit: bypass basic authentication",
          "tags": [
            "mailing-list"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2022/11/29/4"
        },
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          "name": "FEDORA-2023-cf176d02d8",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ULVDTAI76VATRAHTKCE2SUJ4NC3PQZ6Y/"
        },
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          "name": "FEDORA-2023-1b25579262",
          "tags": [
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          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JRSHISR64L6QGSMDFZDNPHHIXSCAKK26/"
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          "name": "FEDORA-2023-c1318fb7f8",
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        }
      ],
      "source": {
        "advisory": "GHSA-7rg2-cxvp-9p7p",
        "discovery": "UNKNOWN"
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      "title": "Prometheus Exporter Toolkit vulnerable to basic authentication bypass"
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  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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    "datePublished": "2022-11-29T00:00:00.000Z",
    "dateReserved": "2022-11-28T00:00:00.000Z",
    "dateUpdated": "2024-08-03T14:24:03.295Z",
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CVE-2026-39819 (GCVE-0-2026-39819)

Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-05-08 21:29

Title

Invoking "go bug" follows symlinks in predictable temporary filenames in cmd/go

Summary

The "go bug" command writes to two files with predictable names in the system temporary directory (for example, "/tmp"). An attacker with access to the temporary directory can create a symlink in one of these names, causing "go bug" to overwrite the target of the symlink.

Severity ?

5.3 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N

CWE

CWE-377 - Insecure Temporary File

Assigner

Go

References

URL

Tags

	https://go.dev/issue/78584
	https://go.dev/cl/763882
	https://groups.google.com/g/golang-announce/c/qcC…
	https://pkg.go.dev/vuln/GO-2026-4978

Impacted products

	Vendor	Product	Version
	Go toolchain	cmd/go	Affected: 0 , < 1.25.10 (semver) Affected: 1.26.0-0 , < 1.26.3 (semver)

Credits

Harshit Gupta (Mr HAX)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "LOCAL",
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          "collectionURL": "https://pkg.go.dev",
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      "credits": [
        {
          "lang": "en",
          "value": "Harshit Gupta (Mr HAX)"
        }
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        {
          "url": "https://pkg.go.dev/vuln/GO-2026-4978"
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      "title": "Invoking \"go bug\" follows symlinks in predictable temporary filenames in cmd/go"
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CVE-2025-61729 (GCVE-0-2025-61729)

Vulnerability from cvelistv5 – Published: 2025-12-02 18:54 – Updated: 2025-12-03 19:37

Title

Excessive resource consumption when printing error string for host certificate validation in crypto/x509

Summary

Within HostnameError.Error(), when constructing an error string, there is no limit to the number of hosts that will be printed out. Furthermore, the error string is constructed by repeated string concatenation, leading to quadratic runtime. Therefore, a certificate provided by a malicious actor can result in excessive resource consumption.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

Go

References

URL

Tags

	https://go.dev/cl/725920
	https://go.dev/issue/76445
	https://groups.google.com/g/golang-announce/c/8FJ…
	https://pkg.go.dev/vuln/GO-2025-4155

Impacted products

	Vendor	Product	Version
	Go standard library	crypto/x509	Affected: 0 , < 1.24.11 (semver) Affected: 1.25.0 , < 1.25.5 (semver)

Credits

Philippe Antoine (Catena cyber)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "name": "Certificate.VerifyHostname"
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              "name": "Certificate.Verify"
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CVE-2026-33814 (GCVE-0-2026-33814)

Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-07-02 12:05

Title

Infinite loop in HTTP/2 transport when given bad SETTINGS_MAX_FRAME_SIZE in net/http/internal/http2 in golang.org/x/net

Summary

When processing HTTP/2 SETTINGS frames, transport will enter an infinite loop of writing CONTINUATION frames if it receives a SETTINGS_MAX_FRAME_SIZE with a value of 0.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Assigner

Go

References

URL

Tags

	https://go.dev/cl/761581
	https://go.dev/cl/761640
	https://go.dev/issue/78476
	https://groups.google.com/g/golang-announce/c/qcC…
	https://pkg.go.dev/vuln/GO-2026-4918

Impacted products

Vendor

Product

Version

golang.org/x/net

golang.org/x/net/http2

Affected: 0 , < 0.53.0 (semver)

Go standard library

net/http

Affected: 0 , < 1.25.10 (semver)
Affected: 1.26.0-0 , < 1.26.3 (semver)

Credits

Marwan Atia (marwansamir688@gmail.com)

Show details on NVD website

JSON

To clipboard

{
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        "workarounds": [
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        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
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          "url": "https://go.dev/cl/761640"
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          "url": "https://go.dev/issue/78476"
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        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-4918"
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      ],
      "title": "Infinite loop in HTTP/2 transport when given bad SETTINGS_MAX_FRAME_SIZE in net/http/internal/http2 in golang.org/x/net"
    }
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  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-33814",
    "datePublished": "2026-05-07T19:41:17.631Z",
    "dateReserved": "2026-03-23T20:35:32.814Z",
    "dateUpdated": "2026-07-02T12:05:19.070Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
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}

CVE-2026-39820 (GCVE-0-2026-39820)

Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-07-03 12:05

Title

Quadratic string concatentation in consumeComment in net/mail

Summary

Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-407 - Inefficient Algorithmic Complexity

Assigner

Go

References

URL

Tags

	https://go.dev/issue/78566
	https://go.dev/cl/759940
	https://groups.google.com/g/golang-announce/c/qcC…
	https://pkg.go.dev/vuln/GO-2026-4986

Impacted products

	Vendor	Product	Version
	Go standard library	net/mail	Affected: 0 , < 1.25.10 (semver) Affected: 1.26.0-0 , < 1.26.3 (semver)

Credits

thatnealpatel

Show details on NVD website

JSON

To clipboard

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CVE-2026-39836 (GCVE-0-2026-39836)

Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-05-08 21:30

Title

Panic in Dial and LookupPort when handling NUL byte on Windows in net

Summary

The Dial and LookupPort functions panic on Windows when provided with an input containing a NUL (0).

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-248 - Uncaught Exception

Assigner

Go

References

URL

Tags

	https://go.dev/issue/79006
	https://groups.google.com/g/golang-announce/c/qcC…
	https://go.dev/cl/775320
	https://pkg.go.dev/vuln/GO-2026-4971

Impacted products

	Vendor	Product	Version
	Go standard library	net	Affected: 0 , < 1.25.10 (semver) Affected: 1.26.0-0 , < 1.26.3 (semver)

Show details on NVD website

JSON

To clipboard

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CVE-2026-39826 (GCVE-0-2026-39826)

Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-05-08 14:05

Title

Escaper bypass leads to XSS in html/template

Summary

If a trusted template author were to write a <script> tag containing an empty 'type' attribute or a 'type' attribute with an ASCII whitespace, the execution of the template would incorrectly escape any data passed into the <script> block.

Severity ?

6.1 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

Go

References

URL

Tags

	https://go.dev/issue/78981
	https://go.dev/cl/771180
	https://groups.google.com/g/golang-announce/c/qcC…
	https://pkg.go.dev/vuln/GO-2026-4980

Impacted products

	Vendor	Product	Version
	Go standard library	html/template	Affected: 0 , < 1.25.10 (semver) Affected: 1.26.0-0 , < 1.26.3 (semver)

Credits

Mundur (https://github.com/M0nd0R)

Show details on NVD website

JSON

To clipboard

{
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CVE-2026-42499 (GCVE-0-2026-42499)

Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-07-03 12:05

Title

Quadratic string concatenation in consumePhrase in net/mail

Summary

Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-407 - Inefficient Algorithmic Complexity

Assigner

Go

References

URL

Tags

	https://go.dev/issue/78987
	https://go.dev/cl/771520
	https://groups.google.com/g/golang-announce/c/qcC…
	https://pkg.go.dev/vuln/GO-2026-4977

Impacted products

	Vendor	Product	Version
	Go standard library	net/mail	Affected: 0 , < 1.25.10 (semver) Affected: 1.26.0-0 , < 1.26.3 (semver)

Show details on NVD website

JSON

To clipboard

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CVE-2026-33811 (GCVE-0-2026-33811)

Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-07-03 12:04

Title

Crash when handling long CNAME response in net

Summary

When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-415 - Double Free

Assigner

Go

References

URL

Tags

	https://go.dev/issue/78803
	https://go.dev/cl/767860
	https://groups.google.com/g/golang-announce/c/qcC…
	https://pkg.go.dev/vuln/GO-2026-4981

Impacted products

	Vendor	Product	Version
	Go standard library	net	Affected: 0 , < 1.25.10 (semver) Affected: 1.26.0-0 , < 1.26.3 (semver)

Credits

hamayanhamayan

Show details on NVD website

JSON

To clipboard

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            "value": "RHSA-2026:33150: Red Hat OpenShift Service Mesh 3.3"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-05-07T20:01:34.913Z",
            "value": "Reported to Red Hat."
          },
          {
            "lang": "en",
            "time": "2026-05-07T19:41:19.285Z",
            "value": "Made public."
          }
        ],
        "title": "net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME",
        "workarounds": [
          {
            "lang": "en",
            "value": "To mitigate this issue, applications can be configured to use the pure Go DNS resolver instead of the `cgo` DNS resolver. This can be achieved by setting the `GODEBUG` environment variable to `netdns=go`. For example, to run a Go application with this mitigation: `GODEBUG=netdns=go /path/to/your/go/application`. This change may require restarting affected applications or services to take effect. Users should verify that this change does not negatively impact DNS resolution for their specific application environment."
          }
        ],
        "x_adpType": "supplier",
        "x_generator": {
          "engine": "sadp-cli 1.0.0"
        }
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "net",
          "product": "net",
          "programRoutines": [
            {
              "name": "cgoResSearch"
            },
            {
              "name": "LookupCNAME"
            },
            {
              "name": "Resolver.LookupCNAME"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.25.10",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.26.3",
              "status": "affected",
              "version": "1.26.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "hamayanhamayan"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-415: Double Free",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-07T19:41:19.285Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
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        {
          "url": "https://go.dev/issue/78803"
        },
        {
          "url": "https://go.dev/cl/767860"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-4981"
        }
      ],
      "title": "Crash when handling long CNAME response in net"
    }
  },
  "cveMetadata": {
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    "dateReserved": "2026-03-23T20:35:32.814Z",
    "dateUpdated": "2026-07-03T12:04:56.809Z",
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}

CVE-2026-42501 (GCVE-0-2026-42501)

Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-05-08 15:48

Title

Malicious module proxy can bypass checksum database in cmd/go

Summary

A malicious module proxy can exploit a flaw in the go command's validation of module checksums to bypass checksum database validation. This vulnerability affects any user using an untrusted module proxy (GOMODPROXY) or checksum database (GOSUMDB). A malicious module proxy can serve altered versions of the Go toolchain. When selecting a different version of the Go toolchain than the currently installed toolchain (due to the GOTOOLCHAIN environment variable, or a go.work or go.mod with a toolchain line), the go command will download and execute a toolchain provided by the module proxy. A malicious module proxy can bypass checksum database validation for this downloaded toolchain. Since this vulnerability affects the security of toolchain downloads, setting GOTOOLCHAIN to a fixed version is not sufficient. You must upgrade your base Go toolchain. The go tool always validates the hash of a toolchain before executing it, so fixed versions will refuse to execute any cached, altered versions of the toolchain. The go tool trusts go.sum files to contain accurate hashes of the current module's dependencies. A malicious proxy exploiting this vulnerability to serve an altered module will have caused an incorrect hash to be recorded in the go.sum. Users who have configured a non-trusted GOPROXY can determine if they have been affected by running "rm go.sum ; go mod tidy ; go mod verify", which will revalidate all dependencies of the current module. The specific flaw in more detail: The go command consults the checksum database to validate downloaded modules, when a module is not listed in the go.sum file. It verifies that the module hash reported by the checksum database matches the hash of the downloaded module. If, however, the checksum database returns a successful response that contains no entry for the module, the go command incorrectly permitted validation to succeed. A module proxy may mirror or proxy the checksum database, in which case the go command will not connect to the checksum database directly. Checksums reported by the checksum database are cryptographically signed, so a malicious proxy cannot alter the reported checksum for a module. However, a proxy which returns an empty checksum response, or a checksum response for an unrelated module, could cause the go command to proceed as if a downloaded module has been validated.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE

CWE-347 - Improper Verification of Cryptographic Signature

Assigner

Go

References

URL

Tags

	https://go.dev/cl/775321
	https://go.dev/issue/79070
	https://groups.google.com/g/golang-announce/c/qcC…
	https://pkg.go.dev/vuln/GO-2026-4984

Impacted products

	Vendor	Product	Version
	Go toolchain	cmd/go	Affected: 0 , < 1.25.10 (semver) Affected: 1.26.0-0 , < 1.26.3 (semver)

Credits

Mundur (https://github.com/M0nd0R)

Show details on NVD website

JSON

To clipboard

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    "adp": [
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        "metrics": [
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CVE-2026-39823 (GCVE-0-2026-39823)

Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-05-08 14:05

Title

Bypass of meta content URL escaping causes XSS in html/template

Summary

CVE-2026-27142 fixed a vulnerability in which URLs were not correctly escaped inside of a <meta> tag's <content> attribute. If the URL content were to insert ASCII whitespaces around the '=' rune inside of the <content> attribute, the escaper would fail to similarly escape it, leading to XSS.

Severity ?

6.1 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

Go

References

URL

Tags

	https://go.dev/issue/78913
	https://go.dev/cl/769920
	https://groups.google.com/g/golang-announce/c/qcC…
	https://pkg.go.dev/vuln/GO-2026-4982

Impacted products

	Vendor	Product	Version
	Go standard library	html/template	Affected: 0 , < 1.25.10 (semver) Affected: 1.26.0-0 , < 1.26.3 (semver)

Credits

Samy Ghannad

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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            {
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            {
              "name": "Template.ExecuteTemplate"
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          ],
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CVE-2026-39825 (GCVE-0-2026-39825)

Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-05-08 21:30

Title

ReverseProxy forwards queries with more than urlmaxqueryparams parameters in net/http/httputil

Summary

ReverseProxy can forward queries containing parameters not visible to Rewrite functions. When used with a Rewrite function, or a Director function which parses query parameters, ReverseProxy sanitizes the forwarded request to remove query parameters which are not parsed by url.ParseQuery. ReverseProxy does not take ParseQuery's limit on the total number of query parameters (controlled by GODEBUG=urlmaxqueryparams=N) into account. This can permit ReverseProxy to forward a request containing a query parameter that is not visible to the Rewrite function. For example, the query "a1=x&a2=x&...&a10000=x&hidden=y" can forward the parameter "hidden=y" while hiding it from the proxy's Rewrite function.

Severity ?

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CWE

CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Assigner

Go

References

URL

Tags

	https://go.dev/cl/770541
	https://go.dev/issue/78948
	https://groups.google.com/g/golang-announce/c/qcC…
	https://pkg.go.dev/vuln/GO-2026-4976

Impacted products

	Vendor	Product	Version
	Go standard library	net/http/httputil	Affected: 0 , < 1.25.10 (semver) Affected: 1.26.0-0 , < 1.26.3 (semver)

Show details on NVD website

JSON

To clipboard

{
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        },
        {
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      ],
      "title": "ReverseProxy forwards queries with more than urlmaxqueryparams parameters in net/http/httputil"
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}

Vulnerability from cleanstart

Tags

Sightings

Nomenclature

Action not permitted

Vulnerability from cleanstart

GHSA-CGRX-MC8F-2PRM

Impact

Additional Impacts

Patches

Mitigations

Other Runtimes

Credits

GHSA-J5W8-Q4QC-RX2X

GHSA-VVGC-356P-C3XW

GHSA-F6X5-JH6R-WRFV

CVE-2025-61727 (GCVE-0-2025-61727)

CVE-2026-39817 (GCVE-0-2026-39817)

CVE-2022-46146 (GCVE-0-2022-46146)

CVE-2026-39819 (GCVE-0-2026-39819)

CVE-2025-61729 (GCVE-0-2025-61729)

CVE-2026-33814 (GCVE-0-2026-33814)

CVE-2026-39820 (GCVE-0-2026-39820)

CVE-2026-39836 (GCVE-0-2026-39836)

CVE-2026-39826 (GCVE-0-2026-39826)

CVE-2026-42499 (GCVE-0-2026-42499)

CVE-2026-33811 (GCVE-0-2026-33811)

CVE-2026-42501 (GCVE-0-2026-42501)

CVE-2026-39823 (GCVE-0-2026-39823)

CVE-2026-39825 (GCVE-0-2026-39825)

Tags

Sightings

Nomenclature