CriticalFix available
pyjwt — security advisory
PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, PyJWT PyJWKClient is affected because redirect destinations are not revalidated against the JWKS trust boundary. This occurs when a configured trusted JWKS endpoint returns an attacker-influenced redirect. As a result, PyJWKClient follows the redirect and consumes the redirected response as key material. Consequently, forwarded credentials may be disclosed or verification keys may be substituted. This issue is fixed in version 2.14.0.
- Products
- pyjwt
- Affected versions
- 2.10.1-1, 2.10.1-2, 2.10.1-2+deb13u1, 2.10.1-3, 2.10.1-4, 2.11.0-2, 2.12.1-1, 2.13.0-1, 2.14.0-1, 2.15.0-1, 2.15.1-1, 2.6.0-1, 2.6.0-1+deb12u1, 2.7.0-1
- Fixed versions
- 2.14.0-1
- CVEs
- CVE-2026-102267
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 09:03 UTC · Revision 1
Source evidence
PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, PyJWT PyJWKClient is affected because redirect destinations are not revalidated against the JWKS trust boundary. This occurs when a configured trusted JWKS endpoint returns an attacker-influenced redirect. As a result, PyJWKClient follows the redirect and consumes the redirected response as key material. Consequently, forwarded credentials may be disclosed or verification keys may be substituted. This issue is fixed in version 2.14.0.
osv:DEBIAN-CVE-2026-102267
pyjwt
Fixed versions: Not specified
pyjwt
Fixed versions: Not specified
pyjwt
Fixed versions: 2.14.0-1
Complete source record
{
"id": "3c5140de33505b5523b6a681389b5978585d76c3cd70f2403d7453dd81fa60fa",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-102267",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-102267",
"summary": "PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, PyJWT PyJWKClient is affected because redirect destinations are not revalidated against the JWKS trust boundary. This occurs when a configured trusted JWKS endpoint returns an attacker-influenced redirect. As a result, PyJWKClient follows the redirect and consumes the redirected response as key material. Consequently, forwarded credentials may be disclosed or verification keys may be substituted. This issue is fixed in version 2.14.0.",
"evidence": "osv:DEBIAN-CVE-2026-102267",
"products": [
{
"name": {
"value": "pyjwt",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.10.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.10.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.10.1-3",
"evidence": "/affected/0/versions"
},
{
"value": "2.10.1-4",
"evidence": "/affected/0/versions"
},
{
"value": "2.11.0-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.12.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.13.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.14.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.15.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.15.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.6.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.6.0-1+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "2.7.0-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "pyjwt",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.10.1-2",
"evidence": "/affected/1/versions"
},
{
"value": "2.10.1-2+deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "2.10.1-3",
"evidence": "/affected/1/versions"
},
{
"value": "2.10.1-4",
"evidence": "/affected/1/versions"
},
{
"value": "2.11.0-2",
"evidence": "/affected/1/versions"
},
{
"value": "2.12.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.13.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.14.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.15.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.15.1-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "pyjwt",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.14.0-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "2.10.1-2",
"evidence": "/affected/2/versions"
},
{
"value": "2.10.1-3",
"evidence": "/affected/2/versions"
},
{
"value": "2.10.1-4",
"evidence": "/affected/2/versions"
},
{
"value": "2.11.0-2",
"evidence": "/affected/2/versions"
},
{
"value": "2.12.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.13.0-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "critical",
"structured": {
"id": "DEBIAN-CVE-2026-102267",
"aliases": [
"DEBIAN-CVE-2026-102267"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "pyjwt",
"purl": "pkg:deb/debian/pyjwt?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.10.1-1",
"2.10.1-2",
"2.10.1-3",
"2.10.1-4",
"2.11.0-2",
"2.12.1-1",
"2.13.0-1",
"2.14.0-1",
"2.15.0-1",
"2.15.1-1",
"2.6.0-1",
"2.6.0-1+deb12u1",
"2.7.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-102267.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "pyjwt",
"purl": "pkg:deb/debian/pyjwt?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.10.1-2",
"2.10.1-2+deb13u1",
"2.10.1-3",
"2.10.1-4",
"2.11.0-2",
"2.12.1-1",
"2.13.0-1",
"2.14.0-1",
"2.15.0-1",
"2.15.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-102267.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.14.0-1"
}
]
}
],
"package": {
"name": "pyjwt",
"purl": "pkg:deb/debian/pyjwt?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.10.1-2",
"2.10.1-3",
"2.10.1-4",
"2.11.0-2",
"2.12.1-1",
"2.13.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-102267.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-08T10:00:30.924330691Z",
"provider": "osv",
"upstream": [
"CVE-2026-102267"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-102267"
]
},
"related_cves": [
{
"value": "CVE-2026-102267",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 98936,
"published_at": "2026-09-28T21:17:14.43+00:00"
}