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Vulnerability from cleanstart
Published
2026-05-18 13:26
Modified
2026-05-12 12:08
Summary
Security fixes for CVE-2026-22815, CVE-2026-30922, CVE-2026-31958, CVE-2026-32597, CVE-2026-33175, CVE-2026-34052, CVE-2026-34073, CVE-2026-34513, CVE-2026-34514, CVE-2026-34515, CVE-2026-34516, CVE-2026-34517, CVE-2026-34518, CVE-2026-34519, CVE-2026-34520, CVE-2026-34525, CVE-2026-44431, CVE-2026-44432, ghsa-752w-5fwx-jx9f, ghsa-78cv-mqj4-43f7, ghsa-gc5v-m9x4-r6x2, ghsa-jr27-m4p2-rc6r, ghsa-m959-cc7f-wv43, ghsa-qjxf-f2mg-c6mc applied in versions: 4.3.2-r0, 4.3.2-r1, 4.3.2-r2, 4.3.2-r3
Details
Multiple security vulnerabilities affect the jupyterhub-k8s-hub package. These issues are resolved in later releases. See references for individual vulnerability details.
{
"affected": [
{
"package": {
"ecosystem": "CleanStart",
"name": "jupyterhub-k8s-hub"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.3.2-r3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"credits": [],
"database_specific": {},
"details": "Multiple security vulnerabilities affect the jupyterhub-k8s-hub package. These issues are resolved in later releases. See references for individual vulnerability details.",
"id": "CLEANSTART-2026-AN27706",
"modified": "2026-05-12T12:08:41Z",
"published": "2026-05-18T13:26:17.643663Z",
"references": [
{
"type": "ADVISORY",
"url": "https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-AN27706.json"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-22815"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-30922"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-31958"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-32597"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-33175"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-34052"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-34073"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-34513"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-34514"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-34515"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-34516"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-34517"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-34518"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-34519"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-34520"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-34525"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-44431"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-44432"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/ghsa-752w-5fwx-jx9f"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/ghsa-78cv-mqj4-43f7"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/ghsa-gc5v-m9x4-r6x2"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/ghsa-jr27-m4p2-rc6r"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/ghsa-m959-cc7f-wv43"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/ghsa-qjxf-f2mg-c6mc"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22815"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-30922"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31958"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32597"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33175"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34052"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34073"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34513"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34514"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34515"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34516"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34517"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34518"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34519"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34520"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34525"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44431"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44432"
}
],
"related": [],
"schema_version": "1.7.3",
"summary": "Security fixes for CVE-2026-22815, CVE-2026-30922, CVE-2026-31958, CVE-2026-32597, CVE-2026-33175, CVE-2026-34052, CVE-2026-34073, CVE-2026-34513, CVE-2026-34514, CVE-2026-34515, CVE-2026-34516, CVE-2026-34517, CVE-2026-34518, CVE-2026-34519, CVE-2026-34520, CVE-2026-34525, CVE-2026-44431, CVE-2026-44432, ghsa-752w-5fwx-jx9f, ghsa-78cv-mqj4-43f7, ghsa-gc5v-m9x4-r6x2, ghsa-jr27-m4p2-rc6r, ghsa-m959-cc7f-wv43, ghsa-qjxf-f2mg-c6mc applied in versions: 4.3.2-r0, 4.3.2-r1, 4.3.2-r2, 4.3.2-r3",
"upstream": [
"CVE-2026-22815",
"CVE-2026-30922",
"CVE-2026-31958",
"CVE-2026-32597",
"CVE-2026-33175",
"CVE-2026-34052",
"CVE-2026-34073",
"CVE-2026-34513",
"CVE-2026-34514",
"CVE-2026-34515",
"CVE-2026-34516",
"CVE-2026-34517",
"CVE-2026-34518",
"CVE-2026-34519",
"CVE-2026-34520",
"CVE-2026-34525",
"CVE-2026-44431",
"CVE-2026-44432",
"ghsa-752w-5fwx-jx9f",
"ghsa-78cv-mqj4-43f7",
"ghsa-gc5v-m9x4-r6x2",
"ghsa-jr27-m4p2-rc6r",
"ghsa-m959-cc7f-wv43",
"ghsa-qjxf-f2mg-c6mc"
]
}
GHSA-752W-5FWX-JX9F
Vulnerability from github – Published: 2026-03-13 20:05 – Updated: 2026-06-08 19:06
VLAI?
Summary
PyJWT accepts unknown `crit` header extensions
Details
Summary
PyJWT does not validate the crit (Critical) Header Parameter defined in
RFC 7515 §4.1.11. When a JWS token contains a crit array listing
extensions that PyJWT does not understand, the library accepts the token
instead of rejecting it. This violates the MUST requirement in the RFC.
This is the same class of vulnerability as CVE-2025-59420 (Authlib), which received CVSS 7.5 (HIGH).
RFC Requirement
RFC 7515 §4.1.11:
The "crit" (Critical) Header Parameter indicates that extensions to this specification and/or [JWA] are being used that MUST be understood and processed. [...] If any of the listed extension Header Parameters are not understood and supported by the recipient, then the JWS is invalid.
Proof of Concept
import jwt # PyJWT 2.8.0
import hmac, hashlib, base64, json
# Construct token with unknown critical extension
header = {"alg": "HS256", "crit": ["x-custom-policy"], "x-custom-policy": "require-mfa"}
payload = {"sub": "attacker", "role": "admin"}
def b64url(data):
return base64.urlsafe_b64encode(data).rstrip(b"=").decode()
h = b64url(json.dumps(header, separators=(",", ":")).encode())
p = b64url(json.dumps(payload, separators=(",", ":")).encode())
sig = b64url(hmac.new(b"secret", f"{h}.{p}".encode(), hashlib.sha256).digest())
token = f"{h}.{p}.{sig}"
# Should REJECT — x-custom-policy is not understood by PyJWT
try:
result = jwt.decode(token, "secret", algorithms=["HS256"])
print(f"ACCEPTED: {result}")
# Output: ACCEPTED: {'sub': 'attacker', 'role': 'admin'}
except Exception as e:
print(f"REJECTED: {e}")
Expected: jwt.exceptions.InvalidTokenError: Unsupported critical extension: x-custom-policy
Actual: Token accepted, payload returned.
Comparison with RFC-compliant library
# jwcrypto — correctly rejects
from jwcrypto import jwt as jw_jwt, jwk
key = jwk.JWK(kty="oct", k=b64url(b"secret"))
jw_jwt.JWT(jwt=token, key=key, algs=["HS256"])
# raises: InvalidJWSObject('Unknown critical header: "x-custom-policy"')
Impact
- Split-brain verification in mixed-library deployments (e.g., API gateway using jwcrypto rejects, backend using PyJWT accepts)
- Security policy bypass when
critcarries enforcement semantics (MFA, token binding, scope restrictions) - Token binding bypass — RFC 7800
cnf(Proof-of-Possession) can be silently ignored - See CVE-2025-59420 for full impact analysis
Suggested Fix
In jwt/api_jwt.py, add validation in _validate_headers() or
decode():
_SUPPORTED_CRIT = {"b64"} # Add extensions PyJWT actually supports
def _validate_crit(self, headers: dict) -> None:
crit = headers.get("crit")
if crit is None:
return
if not isinstance(crit, list) or len(crit) == 0:
raise InvalidTokenError("crit must be a non-empty array")
for ext in crit:
if ext not in self._SUPPORTED_CRIT:
raise InvalidTokenError(f"Unsupported critical extension: {ext}")
if ext not in headers:
raise InvalidTokenError(f"Critical extension {ext} not in header")
CWE
- CWE-345: Insufficient Verification of Data Authenticity
- CWE-863: Incorrect Authorization
References
Severity ?
7.5 (High)
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 2.11.0"
},
"package": {
"ecosystem": "PyPI",
"name": "PyJWT"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.12.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-32597"
],
"database_specific": {
"cwe_ids": [
"CWE-345",
"CWE-863"
],
"github_reviewed": true,
"github_reviewed_at": "2026-03-13T20:05:04Z",
"nvd_published_at": "2026-03-13T19:55:09Z",
"severity": "HIGH"
},
"details": "## Summary\n\nPyJWT does not validate the `crit` (Critical) Header Parameter defined in\nRFC 7515 \u00a74.1.11. When a JWS token contains a `crit` array listing\nextensions that PyJWT does not understand, the library accepts the token\ninstead of rejecting it. This violates the **MUST** requirement in the RFC.\n\nThis is the same class of vulnerability as CVE-2025-59420 (Authlib),\nwhich received CVSS 7.5 (HIGH).\n\n---\n\n## RFC Requirement\n\nRFC 7515 \u00a74.1.11:\n\n\u003e The \"crit\" (Critical) Header Parameter indicates that extensions to this\n\u003e specification and/or [JWA] are being used that **MUST** be understood and\n\u003e processed. [...] If any of the listed extension Header Parameters are\n\u003e **not understood and supported** by the recipient, then the **JWS is invalid**.\n\n---\n\n## Proof of Concept\n\n```python\nimport jwt # PyJWT 2.8.0\nimport hmac, hashlib, base64, json\n\n# Construct token with unknown critical extension\nheader = {\"alg\": \"HS256\", \"crit\": [\"x-custom-policy\"], \"x-custom-policy\": \"require-mfa\"}\npayload = {\"sub\": \"attacker\", \"role\": \"admin\"}\n\ndef b64url(data):\n return base64.urlsafe_b64encode(data).rstrip(b\"=\").decode()\n\nh = b64url(json.dumps(header, separators=(\",\", \":\")).encode())\np = b64url(json.dumps(payload, separators=(\",\", \":\")).encode())\nsig = b64url(hmac.new(b\"secret\", f\"{h}.{p}\".encode(), hashlib.sha256).digest())\ntoken = f\"{h}.{p}.{sig}\"\n\n# Should REJECT \u2014 x-custom-policy is not understood by PyJWT\ntry:\n result = jwt.decode(token, \"secret\", algorithms=[\"HS256\"])\n print(f\"ACCEPTED: {result}\")\n # Output: ACCEPTED: {\u0027sub\u0027: \u0027attacker\u0027, \u0027role\u0027: \u0027admin\u0027}\nexcept Exception as e:\n print(f\"REJECTED: {e}\")\n```\n\n**Expected:** `jwt.exceptions.InvalidTokenError: Unsupported critical extension: x-custom-policy`\n**Actual:** Token accepted, payload returned.\n\n### Comparison with RFC-compliant library\n\n```python\n# jwcrypto \u2014 correctly rejects\nfrom jwcrypto import jwt as jw_jwt, jwk\nkey = jwk.JWK(kty=\"oct\", k=b64url(b\"secret\"))\njw_jwt.JWT(jwt=token, key=key, algs=[\"HS256\"])\n# raises: InvalidJWSObject(\u0027Unknown critical header: \"x-custom-policy\"\u0027)\n```\n\n---\n\n## Impact\n\n- **Split-brain verification** in mixed-library deployments (e.g., API\n gateway using jwcrypto rejects, backend using PyJWT accepts)\n- **Security policy bypass** when `crit` carries enforcement semantics\n (MFA, token binding, scope restrictions)\n- **Token binding bypass** \u2014 RFC 7800 `cnf` (Proof-of-Possession) can be\n silently ignored\n- See CVE-2025-59420 for full impact analysis\n\n---\n\n## Suggested Fix\n\nIn `jwt/api_jwt.py`, add validation in `_validate_headers()` or\n`decode()`:\n\n```python\n_SUPPORTED_CRIT = {\"b64\"} # Add extensions PyJWT actually supports\n\ndef _validate_crit(self, headers: dict) -\u003e None:\n crit = headers.get(\"crit\")\n if crit is None:\n return\n if not isinstance(crit, list) or len(crit) == 0:\n raise InvalidTokenError(\"crit must be a non-empty array\")\n for ext in crit:\n if ext not in self._SUPPORTED_CRIT:\n raise InvalidTokenError(f\"Unsupported critical extension: {ext}\")\n if ext not in headers:\n raise InvalidTokenError(f\"Critical extension {ext} not in header\")\n```\n\n---\n\n## CWE\n\n- CWE-345: Insufficient Verification of Data Authenticity\n- CWE-863: Incorrect Authorization\n\n## References\n\n- [RFC 7515 \u00a74.1.11](https://www.rfc-editor.org/rfc/rfc7515.html#section-4.1.11)\n- [CVE-2025-59420 \u2014 Authlib crit bypass (CVSS 7.5)](https://osv.dev/vulnerability/GHSA-9ggr-2464-2j32)\n- [RFC 7800 \u2014 Proof-of-Possession Key Semantics](https://www.rfc-editor.org/rfc/rfc7800)",
"id": "GHSA-752w-5fwx-jx9f",
"modified": "2026-06-08T19:06:39Z",
"published": "2026-03-13T20:05:04Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/jpadilla/pyjwt/security/advisories/GHSA-752w-5fwx-jx9f"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32597"
},
{
"type": "PACKAGE",
"url": "https://github.com/jpadilla/pyjwt"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyjwt/PYSEC-2026-120.yaml"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2026/05/msg00008.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "PyJWT accepts unknown `crit` header extensions"
}
GHSA-M959-CC7F-WV43
Vulnerability from github – Published: 2026-03-27 19:56 – Updated: 2026-06-05 17:51
VLAI?
Summary
cryptography has incomplete DNS name constraint enforcement on peer names
Details
Summary
In versions of cryptography prior to 46.0.5, DNS name constraints were only validated against SANs within child certificates, and not the "peer name" presented during each validation. Consequently, cryptography would allow a peer named bar.example.com to validate against a wildcard leaf certificate for *.example.com, even if the leaf's parent certificate (or upwards) contained an excluded subtree constraint for bar.example.com.
This behavior resulted from a gap between RFC 5280 (which defines Name Constraint semantics) and RFC 9525 (which defines service identity semantics): put together, neither states definitively whether Name Constraints should be applied to peer names. To close this gap, cryptography now conservatively rejects any validation where the peer name would be rejected by a name constraint if it were a SAN instead.
In practice, exploitation of this bypass requires an uncommon X.509 topology, one that the Web PKI avoids because it exhibits these kinds of problems. Consequently, we consider this a medium-to-low impact severity.
See CVE-2025-61727 for a similar bypass in Go's crypto/x509.
Remediation
Users should upgrade to 46.0.6 or newer.
Attribution
Reporter: @1seal
Severity ?
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "cryptography"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "46.0.6"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-34073"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": true,
"github_reviewed_at": "2026-03-27T19:56:21Z",
"nvd_published_at": "2026-03-31T03:15:59Z",
"severity": "LOW"
},
"details": "## Summary\n\nIn versions of cryptography prior to 46.0.5, DNS name constraints were only validated against SANs within child certificates, and not the \"peer name\" presented during each validation. Consequently, cryptography would allow a peer named `bar.example.com` to validate against a wildcard leaf certificate for `*.example.com`, even if the leaf\u0027s parent certificate (or upwards) contained an excluded subtree constraint for `bar.example.com`.\n\nThis behavior resulted from a gap between RFC 5280 (which defines Name Constraint semantics) and RFC 9525 (which defines service identity semantics): put together, neither states definitively whether Name Constraints should be applied to peer names. To close this gap, cryptography now conservatively rejects any validation where the peer name would be rejected by a name constraint if it were a SAN instead.\n\nIn practice, exploitation of this bypass requires an uncommon X.509 topology, one that the Web PKI avoids because it exhibits these kinds of problems. Consequently, we consider this a medium-to-low impact severity.\n\nSee CVE-2025-61727 for a similar bypass in Go\u0027s `crypto/x509`.\n\n## Remediation\n\nUsers should upgrade to 46.0.6 or newer. \n\n## Attribution\n\nReporter: @1seal",
"id": "GHSA-m959-cc7f-wv43",
"modified": "2026-06-05T17:51:29Z",
"published": "2026-03-27T19:56:21Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/pyca/cryptography/security/advisories/GHSA-m959-cc7f-wv43"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34073"
},
{
"type": "PACKAGE",
"url": "https://github.com/pyca/cryptography"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2026-35.yaml"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U",
"type": "CVSS_V4"
}
],
"summary": "cryptography has incomplete DNS name constraint enforcement on peer names"
}
GHSA-78CV-MQJ4-43F7
Vulnerability from github – Published: 2026-03-11 22:17 – Updated: 2026-03-11 22:17
VLAI?
Summary
Tornado has incomplete validation of cookie attributes
Details
Values passed to the domain, path, and samesite arguments of RequestHandler.set_cookie were not completely validated in versions of Tornado prior to 6.5.5. In particular, semicolons would be allowed, which could be used to inject attacker-controlled values for other cookie attributes.
Severity ?
5.4 (Medium)
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 6.5.4"
},
"package": {
"ecosystem": "PyPI",
"name": "tornado"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.5.5"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-74"
],
"github_reviewed": true,
"github_reviewed_at": "2026-03-11T22:17:00Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "Values passed to the `domain`, `path`, and `samesite` arguments of `RequestHandler.set_cookie` were not completely validated in versions of Tornado prior to 6.5.5. In particular, semicolons would be allowed, which could be used to inject attacker-controlled values for other cookie attributes.",
"id": "GHSA-78cv-mqj4-43f7",
"modified": "2026-03-11T22:17:00Z",
"published": "2026-03-11T22:17:00Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/tornadoweb/tornado/security/advisories/GHSA-78cv-mqj4-43f7"
},
{
"type": "WEB",
"url": "https://github.com/tornadoweb/tornado/commit/24a2d96ea115f663b223887deb0060f13974c104"
},
{
"type": "PACKAGE",
"url": "https://github.com/tornadoweb/tornado"
},
{
"type": "WEB",
"url": "https://github.com/tornadoweb/tornado/releases/tag/v6.5.5"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "Tornado has incomplete validation of cookie attributes"
}
GHSA-GC5V-M9X4-R6X2
Vulnerability from github – Published: 2026-03-25 16:56 – Updated: 2026-03-27 22:07
VLAI?
Summary
Requests has Insecure Temp File Reuse in its extract_zipped_paths() utility function
Details
Impact
The requests.utils.extract_zipped_paths() utility function uses a predictable filename when extracting files from zip archives into the system temporary directory. If the target file already exists, it is reused without validation. A local attacker with write access to the temp directory could pre-create a malicious file that would be loaded in place of the legitimate one.
Affected usages
Standard usage of the Requests library is not affected by this vulnerability. Only applications that call extract_zipped_paths() directly are impacted.
Remediation
Upgrade to at least Requests 2.33.0, where the library now extracts files to a non-deterministic location.
If developers are unable to upgrade, they can set TMPDIR in their environment to a directory with restricted write access.
Severity ?
4.4 (Medium)
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "requests"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.33.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-25645"
],
"database_specific": {
"cwe_ids": [
"CWE-377"
],
"github_reviewed": true,
"github_reviewed_at": "2026-03-25T16:56:28Z",
"nvd_published_at": "2026-03-25T17:16:52Z",
"severity": "MODERATE"
},
"details": "### Impact\nThe `requests.utils.extract_zipped_paths()` utility function uses a predictable filename when extracting files from zip archives into the system temporary directory. If the target file already exists, it is reused without validation. A local attacker with write access to the temp directory could pre-create a malicious file that would be loaded in place of the legitimate one.\n\n### Affected usages\n**Standard usage of the Requests library is not affected by this vulnerability.** Only applications that call `extract_zipped_paths()` directly are impacted.\n\n### Remediation\nUpgrade to at least Requests 2.33.0, where the library now extracts files to a non-deterministic location.\n\nIf developers are unable to upgrade, they can set `TMPDIR` in their environment to a directory with restricted write access.",
"id": "GHSA-gc5v-m9x4-r6x2",
"modified": "2026-03-27T22:07:42Z",
"published": "2026-03-25T16:56:28Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/psf/requests/security/advisories/GHSA-gc5v-m9x4-r6x2"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25645"
},
{
"type": "WEB",
"url": "https://github.com/psf/requests/commit/66d21cb07bd6255b1280291c4fafb71803cdb3b7"
},
{
"type": "PACKAGE",
"url": "https://github.com/psf/requests"
},
{
"type": "WEB",
"url": "https://github.com/psf/requests/releases/tag/v2.33.0"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "Requests has Insecure Temp File Reuse in its extract_zipped_paths() utility function"
}
GHSA-QJXF-F2MG-C6MC
Vulnerability from github – Published: 2026-03-12 14:19 – Updated: 2026-06-08 19:51
VLAI?
Summary
Tornado is vulnerable to DoS due to too many multipart parts
Details
In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the max_body_size setting (default 100MB). Since parsing occurs synchronously on the main thread, this creates the possibility of denial-of-service due to the cost of parsing very large multipart bodies with many parts.
Tornado 6.5.5 introduces new limits on the size and complexity of multipart bodies, including a default limit of 100 parts per request. These limits are configurable if needed; see tornado.httputil.ParseMultipartConfig. It is also now possible to disable multipart/form-data parsing entirely if it is not required for the application.
Severity ?
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 6.5.4"
},
"package": {
"ecosystem": "PyPI",
"name": "tornado"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.5.5"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-31958"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2026-03-12T14:19:52Z",
"nvd_published_at": "2026-03-11T20:16:16Z",
"severity": "HIGH"
},
"details": "In versions of Tornado prior to 6.5.5, the only limit on the number of parts in `multipart/form-data` is the `max_body_size` setting (default 100MB). Since parsing occurs synchronously on the main thread, this creates the possibility of denial-of-service due to the cost of parsing very large multipart bodies with many parts. \n\nTornado 6.5.5 introduces new limits on the size and complexity of multipart bodies, including a default limit of 100 parts per request. These limits are configurable if needed; see `tornado.httputil.ParseMultipartConfig`. It is also now possible to disable `multipart/form-data` parsing entirely if it is not required for the application.",
"id": "GHSA-qjxf-f2mg-c6mc",
"modified": "2026-06-08T19:51:12Z",
"published": "2026-03-12T14:19:52Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/tornadoweb/tornado/security/advisories/GHSA-qjxf-f2mg-c6mc"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31958"
},
{
"type": "WEB",
"url": "https://github.com/tornadoweb/tornado/commit/119a195e290c43ad2d63a2cf012c29d43d6ed839"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/tornado/PYSEC-2026-140.yaml"
},
{
"type": "PACKAGE",
"url": "https://github.com/tornadoweb/tornado"
},
{
"type": "WEB",
"url": "https://github.com/tornadoweb/tornado/releases/tag/v6.5.5"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2026/04/msg00000.html"
}
],
"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:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Tornado is vulnerable to DoS due to too many multipart parts"
}
GHSA-JR27-M4P2-RC6R
Vulnerability from github – Published: 2026-03-17 16:17 – Updated: 2026-05-01 18:31
VLAI?
Summary
Denial of Service in pyasn1 via Unbounded Recursion
Details
Summary
The pyasn1 library is vulnerable to a Denial of Service (DoS) attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing nested SEQUENCE (0x30) or SET (0x31) tags with Indefinite Length (0x80) markers. This forces the decoder to recursively call itself until the Python interpreter crashes with a RecursionError or consumes all available memory (OOM), crashing the host application.
Details
The vulnerability exists because the decoder iterates through the input stream and recursively calls decodeFun (the decoding callback) for every nested component found, without tracking or limiting the recursion depth.
Vulnerable Code Locations:
1. indefLenValueDecoder (Line 998):
for component in decodeFun(substrate, asn1Spec, allowEoo=True, **options):
This method handles indefinite-length constructed types. It sits inside a while True loop and recursively calls the decoder for every nested tag.
-
valueDecoder(Lines 786 and 907):for component in decodeFun(substrate, componentType, **options):This method handles standard decoding when a schema is present. It contains two distinct recursive calls that lack depth checks: Line 786: Recursively decodes components ofSEQUENCEorSETtypes. Line 907: Recursively decodes elements ofSEQUENCE OForSET OFtypes. -
_decodeComponentsSchemaless(Line 661):for component in decodeFun(substrate, **options):This method handles decoding when no schema is provided.
In all three cases, decodeFun is invoked without passing a depth parameter or checking against a global MAX_ASN1_NESTING limit.
PoC
import sys
from pyasn1.codec.ber import decoder
sys.setrecursionlimit(100000)
print("[*] Generating Recursion Bomb Payload...")
depth = 50_000
chunk = b'\x30\x80'
payload = chunk * depth
print(f"[*] Payload size: {len(payload) / 1024:.2f} KB")
print("[*] Triggering Decoder...")
try:
decoder.decode(payload)
except RecursionError:
print("[!] Crashed: Recursion Limit Hit")
except MemoryError:
print("[!] Crashed: Out of Memory")
except Exception as e:
print(f"[!] Crashed: {e}")
[*] Payload size: 9.77 KB
[*] Triggering Decoder...
[!] Crashed: Recursion Limit Hit
Impact
- This is an unhandled runtime exception that typically terminates the worker process or thread handling the request. This allows a remote attacker to trivially kill service workers with a small payload (<100KB), resulting in a Denial of Service. Furthermore, in environments where recursion limits are increased, this leads to server-wide memory exhaustion.
- Service Crash: Any service using
pyasn1to parse untrusted ASN.1 data (e.g., LDAP, SNMP, Kerberos, X.509 parsers) can be crashed remotely. - Resource Exhaustion: The attack consumes RAM linearly with the nesting depth. A small payload (<200KB) can consume hundreds of megabytes of RAM or exhaust the stack.
Credits
Vulnerability discovered by Kevin Tu of TMIR at ByteDance.
Severity ?
7.5 (High)
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 0.6.2"
},
"package": {
"ecosystem": "PyPI",
"name": "pyasn1"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.6.3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-30922"
],
"database_specific": {
"cwe_ids": [
"CWE-674"
],
"github_reviewed": true,
"github_reviewed_at": "2026-03-17T16:17:33Z",
"nvd_published_at": "2026-03-18T04:17:18Z",
"severity": "HIGH"
},
"details": "### Summary\nThe `pyasn1` library is vulnerable to a Denial of Service (DoS) attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing nested `SEQUENCE` (`0x30`) or `SET` (`0x31`) tags with Indefinite Length (`0x80`) markers. This forces the decoder to recursively call itself until the Python interpreter crashes with a `RecursionError` or consumes all available memory (OOM), crashing the host application.\n\n### Details\nThe vulnerability exists because the decoder iterates through the input stream and recursively calls `decodeFun` (the decoding callback) for every nested component found, without tracking or limiting the recursion depth.\nVulnerable Code Locations:\n1. `indefLenValueDecoder` (Line 998):\n```for component in decodeFun(substrate, asn1Spec, allowEoo=True, **options):```\nThis method handles indefinite-length constructed types. It sits inside a `while True` loop and recursively calls the decoder for every nested tag.\n\n2. `valueDecoder` (Lines 786 and 907):\n```for component in decodeFun(substrate, componentType, **options):```\nThis method handles standard decoding when a schema is present. It contains two distinct recursive calls that lack depth checks: Line 786: Recursively decodes components of `SEQUENCE` or `SET` types. Line 907: Recursively decodes elements of `SEQUENCE OF` or `SET OF` types.\n\n4. `_decodeComponentsSchemaless` (Line 661):\n```for component in decodeFun(substrate, **options):```\nThis method handles decoding when no schema is provided.\n\nIn all three cases, `decodeFun` is invoked without passing a `depth` parameter or checking against a global `MAX_ASN1_NESTING` limit.\n\n### PoC\n```\nimport sys\nfrom pyasn1.codec.ber import decoder\n\nsys.setrecursionlimit(100000)\n\nprint(\"[*] Generating Recursion Bomb Payload...\")\ndepth = 50_000\nchunk = b\u0027\\x30\\x80\u0027 \npayload = chunk * depth\n\nprint(f\"[*] Payload size: {len(payload) / 1024:.2f} KB\")\nprint(\"[*] Triggering Decoder...\")\n\ntry:\n decoder.decode(payload)\nexcept RecursionError:\n print(\"[!] Crashed: Recursion Limit Hit\")\nexcept MemoryError:\n print(\"[!] Crashed: Out of Memory\")\nexcept Exception as e:\n print(f\"[!] Crashed: {e}\")\n```\n\n```\n[*] Payload size: 9.77 KB\n[*] Triggering Decoder...\n[!] Crashed: Recursion Limit Hit\n```\n\n### Impact\n- This is an unhandled runtime exception that typically terminates the worker process or thread handling the request. This allows a remote attacker to trivially kill service workers with a small payload (\u003c100KB), resulting in a Denial of Service. Furthermore, in environments where recursion limits are increased, this leads to server-wide memory exhaustion.\n- Service Crash: Any service using `pyasn1` to parse untrusted ASN.1 data (e.g., LDAP, SNMP, Kerberos, X.509 parsers) can be crashed remotely.\n- Resource Exhaustion: The attack consumes RAM linearly with the nesting depth. A small payload (\u003c200KB) can consume hundreds of megabytes of RAM or exhaust the stack.\n\n### Credits\nVulnerability discovered by Kevin Tu of TMIR at ByteDance.",
"id": "GHSA-jr27-m4p2-rc6r",
"modified": "2026-05-01T18:31:19Z",
"published": "2026-03-17T16:17:33Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/pyasn1/pyasn1/security/advisories/GHSA-jr27-m4p2-rc6r"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-30922"
},
{
"type": "WEB",
"url": "https://github.com/pyasn1/pyasn1/commit/25ad481c19fdb006e20485ef3fc2e5b3eff30ef0"
},
{
"type": "WEB",
"url": "https://github.com/pyasn1/pyasn1/commit/5a49bd1fe93b5b866a1210f6bf0a3924f21572c8"
},
{
"type": "PACKAGE",
"url": "https://github.com/pyasn1/pyasn1"
},
{
"type": "WEB",
"url": "https://github.com/pyasn1/pyasn1/releases/tag/v0.6.3"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2026/05/msg00001.html"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2026/03/20/4"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "Denial of Service in pyasn1 via Unbounded Recursion"
}
CVE-2026-34516 (GCVE-0-2026-34516)
Vulnerability from cvelistv5 – Published: 2026-04-01 20:13 – Updated: 2026-04-04 03:11
VLAI?
EPSS
Title
AIOHTTP: Multipart Header Size Bypass
Summary
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, a response with an excessive number of multipart headers may be allowed to use more memory than intended, potentially allowing a DoS vulnerability. This issue has been patched in version 3.13.4.
Severity ?
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
{
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"metrics": [
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"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
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},
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}
],
"cna": {
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{
"product": "aiohttp",
"vendor": "aio-libs",
"versions": [
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}
]
}
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}
],
"metrics": [
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"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U",
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},
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}
},
"cveMetadata": {
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"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-34516",
"datePublished": "2026-04-01T20:13:04.893Z",
"dateReserved": "2026-03-30T16:03:31.047Z",
"dateUpdated": "2026-04-04T03:11:58.583Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-33175 (GCVE-0-2026-33175)
Vulnerability from cvelistv5 – Published: 2026-04-03 21:56 – Updated: 2026-04-07 16:01
VLAI?
EPSS
Title
OAuthenticator: Authentication Bypass in Auth0OAuthenticator via Unverified Email Claims
Summary
OAuthenticator is software that allows OAuth2 identity providers to be plugged in and used with JupyterHub. Prior to version 17.4.0, an authentication bypass vulnerability in oauthenticator allows an attacker with an unverified email address on an Auth0 tenant to login to JupyterHub. When email is used as the usrname_claim, this gives users control over their username and the possibility of account takeover. This issue has been patched in version 17.4.0.
Severity ?
8.8 (High)
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| jupyterhub | oauthenticator |
Affected:
< 17.4.0
|
{
"containers": {
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{
"metrics": [
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"other": {
"content": {
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}
]
}
],
"descriptions": [
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CVE-2026-34514 (GCVE-0-2026-34514)
Vulnerability from cvelistv5 – Published: 2026-04-01 20:09 – Updated: 2026-04-02 14:07
VLAI?
EPSS
Title
AIOHTTP: CRLF injection in multipart part content type header construction
Summary
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, an attacker who controls the content_type parameter in aiohttp could use this to inject extra headers or similar exploits. This issue has been patched in version 3.13.4.
Severity ?
CWE
- CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
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CVE-2026-34519 (GCVE-0-2026-34519)
Vulnerability from cvelistv5 – Published: 2026-04-01 20:26 – Updated: 2026-04-02 15:40
VLAI?
EPSS
Title
AIOHTTP: HTTP response splitting via \r in reason phrase
Summary
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, an attacker who controls the reason parameter when creating a Response may be able to inject extra headers or similar exploits. This issue has been patched in version 3.13.4.
Severity ?
CWE
- CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
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CVE-2026-34052 (GCVE-0-2026-34052)
Vulnerability from cvelistv5 – Published: 2026-04-03 22:04 – Updated: 2026-04-06 18:59
VLAI?
EPSS
Title
LTI JupyterHub Authenticator: Unbounded Memory Growth via Nonce Storage (Denial of Service)
Summary
LTI JupyterHub Authenticator is a JupyterHub authenticator for LTI. Prior to version 1.6.3, the LTI 1.1 validator stores OAuth nonces in a class-level dictionary that grows without bounds. Nonces are added before signature validation, so an attacker with knowledge of a valid consumer key can send repeated requests with unique nonces to gradually exhaust server memory, causing a denial of service. This issue has been patched in version 1.6.3.
Severity ?
5.9 (Medium)
CWE
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| jupyterhub | ltiauthenticator |
Affected:
< 1.6.3
|
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CVE-2026-34520 (GCVE-0-2026-34520)
Vulnerability from cvelistv5 – Published: 2026-04-01 20:27 – Updated: 2026-04-04 03:13
VLAI?
EPSS
Title
AIOHTTP: C parser (llhttp) accepts null bytes and control characters in response header values - header injection / security bypass
Summary
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, the C parser (the default for most installs) accepted null bytes and control characters in response headers. This issue has been patched in version 3.13.4.
Severity ?
CWE
- CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
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CVE-2026-34517 (GCVE-0-2026-34517)
Vulnerability from cvelistv5 – Published: 2026-04-01 20:14 – Updated: 2026-06-23 15:50
VLAI?
EPSS
Title
AIOHTTP: Late size enforcement for non-file multipart fields causes memory DoS
Summary
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, for some multipart form fields, aiohttp read the entire field into memory before checking client_max_size. This issue has been patched in version 3.13.4.
Severity ?
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
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|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2026-34518 (GCVE-0-2026-34518)
Vulnerability from cvelistv5 – Published: 2026-04-01 20:15 – Updated: 2026-04-02 14:06
VLAI?
EPSS
Title
AIOHTTP: Cookie and Proxy-Authorization headers leaked on cross-origin redirect
Summary
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, when following redirects to a different origin, aiohttp drops the Authorization header, but retains the Cookie and Proxy-Authorization headers. This issue has been patched in version 3.13.4.
Severity ?
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
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CVE-2026-30922 (GCVE-0-2026-30922)
Vulnerability from cvelistv5 – Published: 2026-03-18 02:29 – Updated: 2026-05-01 16:21
VLAI?
EPSS
Title
pyasn1 Vulnerable to Denial of Service via Unbounded Recursion
Summary
pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the `pyasn1` library is vulnerable to a Denial of Service (DoS) attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing thousands of nested `SEQUENCE` (`0x30`) or `SET` (`0x31`) tags with "Indefinite Length" (`0x80`) markers. This forces the decoder to recursively call itself until the Python interpreter crashes with a `RecursionError` or consumes all available memory (OOM), crashing the host application. This is a distinct vulnerability from CVE-2026-23490 (which addressed integer overflows in OID decoding). The fix for CVE-2026-23490 (`MAX_OID_ARC_CONTINUATION_OCTETS`) does not mitigate this recursion issue. Version 0.6.3 fixes this specific issue.
Severity ?
7.5 (High)
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
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|---|---|---|---|---|---|---|---|---|
|
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CVE-2026-22815 (GCVE-0-2026-22815)
Vulnerability from cvelistv5 – Published: 2026-04-01 20:08 – Updated: 2026-04-04 03:10
VLAI?
EPSS
Title
AIOHTTP: Uncapped memory usage possible through aiohttp allowing unlimited trailer headers
Summary
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, insufficient restrictions in header/trailer handling could cause uncapped memory usage. This issue has been patched in version 3.13.4.
Severity ?
CWE
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
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CVE-2026-32597 (GCVE-0-2026-32597)
Vulnerability from cvelistv5 – Published: 2026-03-12 21:41 – Updated: 2026-07-01 12:04
VLAI?
EPSS
Title
PyJWT accepts unknown `crit` header extensions (RFC 7515 §4.1.11 MUST violation)
Summary
PyJWT is a JSON Web Token implementation in Python. Prior to 2.12.0, PyJWT does not validate the crit (Critical) Header Parameter defined in RFC 7515 §4.1.11. When a JWS token contains a crit array listing extensions that PyJWT does not understand, the library accepts the token instead of rejecting it. This violates the MUST requirement in the RFC. This vulnerability is fixed in 2.12.0.
Severity ?
7.5 (High)
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
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CVE-2026-34073 (GCVE-0-2026-34073)
Vulnerability from cvelistv5 – Published: 2026-03-31 02:04 – Updated: 2026-03-31 13:52
VLAI?
EPSS
Title
cryptography has incomplete DNS name constraint enforcement on peer names
Summary
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Prior to version 46.0.6, DNS name constraints were only validated against SANs within child certificates, and not the "peer name" presented during each validation. Consequently, cryptography would allow a peer named bar.example.com to validate against a wildcard leaf certificate for *.example.com, even if the leaf's parent certificate (or upwards) contained an excluded subtree constraint for bar.example.com. This issue has been patched in version 46.0.6.
Severity ?
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| pyca | cryptography |
Affected:
< 46.0.6
|
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CVE-2026-34525 (GCVE-0-2026-34525)
Vulnerability from cvelistv5 – Published: 2026-04-01 20:28 – Updated: 2026-06-23 15:50
VLAI?
EPSS
Title
AIOHTTP: Duplicate Host header accepted
Summary
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, multiple Host headers were allowed in aiohttp. This issue has been patched in version 3.13.4.
Severity ?
CWE
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
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CVE-2026-34515 (GCVE-0-2026-34515)
Vulnerability from cvelistv5 – Published: 2026-04-01 20:10 – Updated: 2026-04-02 15:38
VLAI?
EPSS
Title
AIOHTTP: UNC SSRF/NTLMv2 Credential Theft/Local File Read in static resource handler on Windows
Summary
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Severity ?
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
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CVE-2026-31958 (GCVE-0-2026-31958)
Vulnerability from cvelistv5 – Published: 2026-03-11 19:27 – Updated: 2026-04-01 14:32
VLAI?
EPSS
Title
Tornado has a DoS due to too many multipart parts
Summary
Tornado is a Python web framework and asynchronous networking library. In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the max_body_size setting (default 100MB). Since parsing occurs synchronously on the main thread, this creates the possibility of denial-of-service due to the cost of parsing very large multipart bodies with many parts. This vulnerability is fixed in 6.5.5.
Severity ?
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| tornadoweb | tornado |
Affected:
< 6.5.5
|
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CVE-2026-34513 (GCVE-0-2026-34513)
Vulnerability from cvelistv5 – Published: 2026-04-01 20:06 – Updated: 2026-06-23 15:50
VLAI?
EPSS
Title
AIOHTTP: Denial of Service (DoS) via Unbounded DNS Cache in TCPConnector
Summary
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, an unbounded DNS cache could result in excessive memory usage possibly resulting in a DoS situation. This issue has been patched in version 3.13.4.
Severity ?
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
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CVE-2026-44431 (GCVE-0-2026-44431)
Vulnerability from cvelistv5 – Published: 2026-05-13 15:20 – Updated: 2026-06-26 11:01
VLAI?
EPSS
Title
urllib3: Sensitive headers forwarded across origins in proxied low-level redirects
Summary
urllib3 is an HTTP client library for Python. From 1.23 to before 2.7.0, cross-origin redirects followed from the low-level API via ProxyManager.connection_from_url().urlopen(..., assert_same_host=False) still forward these sensitive headers. This vulnerability is fixed in 2.7.0.
Severity ?
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
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CVE-2026-44432 (GCVE-0-2026-44432)
Vulnerability from cvelistv5 – Published: 2026-05-13 15:17 – Updated: 2026-07-02 12:04
VLAI?
EPSS
Title
urllib3: Decompression-bomb safeguards bypassed in parts of the streaming API
Summary
urllib3 is an HTTP client library for Python. From 2.6.0 to before 2.7.0, urllib3 could decompress the whole response instead of the requested portion (1) during the second HTTPResponse.read(amt=N) call when the response was decompressed using the official Brotli library or (2) when HTTPResponse.drain_conn() was called after the response had been read and decompressed partially (compression algorithm did not matter here). These issues could cause urllib3 to fully decode a small amount of highly compressed data in a single operation. This could result in excessive resource consumption (high CPU usage and massive memory allocation for the decompressed data) on the client side. This vulnerability is fixed in 2.7.0.
Severity ?
CWE
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
Assigner
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{
"lang": "en",
"value": "RHSA-2026:34160: Red Hat Ansible Automation Platform 2.6 for RHEL 9"
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{
"lang": "en",
"value": "RHSA-2026:27929: Red Hat Enterprise Linux AppStream (v. 10)"
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{
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"value": "RHSA-2026:32992: Red Hat Enterprise Linux AppStream (v. 8)"
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{
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"value": "RHSA-2026:28159: Red Hat Enterprise Linux AppStream (v. 9)"
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{
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"value": "RHSA-2026:28157: Red Hat Enterprise Linux AppStream (v. 9)"
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{
"lang": "en",
"value": "RHSA-2026:28000: Red Hat Enterprise Linux BaseOS (v. 10)"
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{
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{
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{
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{
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"value": "RHSA-2026:24541: Red Hat AI Inference Server 3.4"
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{
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{
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{
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{
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{
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{
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{
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{
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"value": "RHSA-2026:24374: Red Hat Hardened Images"
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{
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{
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{
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"timeline": [
{
"lang": "en",
"time": "2026-05-13T17:01:01.083Z",
"value": "Reported to Red Hat."
},
{
"lang": "en",
"time": "2026-05-13T15:17:12.611Z",
"value": "Made public."
}
],
"title": "urllib3: urllib3: Denial of Service due to excessive HTTP response decompression",
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]
}
],
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"value": "urllib3 is an HTTP client library for Python. From 2.6.0 to before 2.7.0, urllib3 could decompress the whole response instead of the requested portion (1) during the second HTTPResponse.read(amt=N) call when the response was decompressed using the official Brotli library or (2) when HTTPResponse.drain_conn() was called after the response had been read and decompressed partially (compression algorithm did not matter here). These issues could cause urllib3 to fully decode a small amount of highly compressed data in a single operation. This could result in excessive resource consumption (high CPU usage and massive memory allocation for the decompressed data) on the client side. This vulnerability is fixed in 2.7.0."
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],
"metrics": [
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"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 8.9,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "HIGH",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
}
}
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"descriptions": [
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"cweId": "CWE-409",
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"discovery": "UNKNOWN"
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"title": "urllib3: Decompression-bomb safeguards bypassed in parts of the streaming API"
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"dateReserved": "2026-05-06T14:40:00.954Z",
"dateUpdated": "2026-07-02T12:04:45.067Z",
"state": "PUBLISHED"
},
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}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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