PYSEC-2026-563

Vulnerability from pysec - Published: 2026-06-29 11:50 - Updated: 2026-07-01 20:23
VLAI?
Details

The package libvcs before 0.11.1 are vulnerable to Command Injection via argument injection. When calling the update_repo function (when using hg), the url parameter is passed to the hg clone command. By injecting some hg options it was possible to get arbitrary command execution.

Severity ?
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Impacted products
Name purl
vcspull pkg:pypi/vcspull
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "vcspull",
        "purl": "pkg:pypi/vcspull"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.11.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0.10",
        "0.0.6",
        "0.0.7",
        "0.0.8",
        "0.0.8.1",
        "0.0.8.2",
        "0.0.8.3",
        "0.0.8.4",
        "0.0.9",
        "0.0.9.1",
        "0.1.0",
        "0.1.1",
        "0.2.0",
        "0.2.1",
        "0.2.2",
        "0.9.0",
        "1.0.0",
        "1.0.1",
        "1.0.2",
        "1.0.3",
        "1.1.0",
        "1.10.0",
        "1.11.0",
        "1.2.0",
        "1.3.0",
        "1.3.0.post1",
        "1.3.0.post2",
        "1.3.1",
        "1.4.0",
        "1.4.1",
        "1.4.2",
        "1.4.3",
        "1.5.0",
        "1.5.0a1",
        "1.5.0a2",
        "1.5.0a3",
        "1.5.0a4",
        "1.6.0",
        "1.6.1",
        "1.7.0",
        "1.7.0.post0",
        "1.8.0",
        "1.8.1",
        "1.9.0",
        "1.9.0.post1",
        "1.9.0.post2"
      ]
    }
  ],
  "aliases": [
    "CVE-2022-21187",
    "GHSA-mv2w-4jqc-6fg4"
  ],
  "details": "The package libvcs before 0.11.1 are vulnerable to Command Injection via argument injection. When calling the update_repo function (when using hg), the url parameter is passed to the hg clone command. By injecting some hg options it was possible to get arbitrary command execution.",
  "id": "PYSEC-2026-563",
  "modified": "2026-07-01T20:23:11.167334Z",
  "published": "2026-06-29T11:50:31.953566Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-21187"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vcs-python/libvcs/pull/306"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vcs-python/vcspull/commit/e1b77128a1fa0754625b5f43d8bc47956f21f33e"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/libvcs/PYSEC-2022-163.yaml"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vcs-python/libvcs/blob/master/CHANGES#libvcs-0111-2022-03-12"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vcs-python/libvcs/blob/v0.11.1/CHANGES%23libvcs-0111-2022-03-12"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vcs-python/vcspull/blob/master/CHANGES#vcspull-1111-2022-03-12"
    },
    {
      "type": "WEB",
      "url": "https://snyk.io/vuln/SNYK-PYTHON-LIBVCS-2421204"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/vcspull"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-mv2w-4jqc-6fg4"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Command injection in libvcs and vcspull"
}


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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.