CVE catalog

CVE-2026-102265

PyJWT is a Python implementation of JSON Web Token standards. From 2.13.0 until 2.14.0, PyJWS._load in jwt/api_jws.py is affected because parser catches ValueError but not RecursionError. This occurs

[CVE catalog]

Severity: Medium · CVSS 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Published: Sep 28, 2026, 8:48:04 PM UTC
Updated: Sep 28, 2026, 9:17:14 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.34% · Oct 25, 2026

PyJWT is a Python implementation of JSON Web Token standards. From 2.13.0 until 2.14.0, PyJWS._load in jwt/api_jws.py is affected because parser catches ValueError but not RecursionError. This occurs when a deeply nested token header reaches json.loads. As a result, RecursionError escapes the documented PyJWT error hierarchy. Consequently, an unauthenticated malformed token can cause a request-level failure and HTTP 500. This issue is fixed in version 2.14.0.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	pyjwt	sid	`2.15.1-1`	fixed
Debian	pyjwt	forky	`2.15.1-1`	fixed
Debian	pyjwt	trixie	`2.10.1-2+deb13u1`	vulnerable
Debian	pyjwt	trixie-security	`2.10.1-2+deb13u1`	vulnerable
Debian	pyjwt	bookworm	`2.6.0-1+deb12u1`	vulnerable
Debian	pyjwt	bookworm-security	`2.6.0-1+deb12u1`	vulnerable
PyPI	pyjwt	Not reported	`2.14.0`	fixed
PyPI	pyjwt	Not reported	`2.14.0`	fixed
Cpe	pyjwt	Not reported	Not reported	unknown
Ubuntu	pyjwt	pro	`1.7.0-2`	vulnerable
Ubuntu	pyjwt	pro	`1.7.1-1`	vulnerable
Ubuntu	pyjwt	pro	`1.7.1-2ubuntu1`	vulnerable
Ubuntu	pyjwt	pro	`1.7.1-2ubuntu2`	vulnerable
Ubuntu	pyjwt	pro	`1.7.1-2ubuntu2.1`	vulnerable
Ubuntu	pyjwt	pro	`1.7.1-2ubuntu2.1+esm1`	vulnerable
Ubuntu	pyjwt	pro	`1.7.1-2ubuntu2.1+esm2`	vulnerable
Ubuntu	pyjwt	pro	`1.7.1-2ubuntu2.1+esm3`	vulnerable
Ubuntu	pyjwt	pro	`1.7.1-2ubuntu2.1+esm4`	vulnerable
Ubuntu	pyjwt	22.04	`1.7.1-2ubuntu2`	vulnerable
Ubuntu	pyjwt	22.04	`2.1.0-1`	vulnerable
Ubuntu	pyjwt	22.04	`2.3.0-1`	vulnerable
Ubuntu	pyjwt	22.04	`2.3.0-1ubuntu0.1`	vulnerable
Ubuntu	pyjwt	22.04	`2.3.0-1ubuntu0.2`	vulnerable
Ubuntu	pyjwt	22.04	`2.3.0-1ubuntu0.3`	vulnerable
Ubuntu	pyjwt	22.04	`2.3.0-1ubuntu0.4`	vulnerable
Ubuntu	pyjwt	22.04	`2.3.0-1ubuntu0.5`	vulnerable
Ubuntu	pyjwt	22.04	`2.3.0-1ubuntu0.6`	vulnerable
Ubuntu	pyjwt	24.04	`2.7.0-1`	vulnerable
Ubuntu	pyjwt	24.04	`2.7.0-1ubuntu0.1`	vulnerable
Ubuntu	pyjwt	24.04	`2.7.0-1ubuntu0.2`	vulnerable
Ubuntu	pyjwt	24.04	`2.7.0-1ubuntu0.3`	vulnerable
Ubuntu	pyjwt	24.04	`2.7.0-1ubuntu0.4`	vulnerable
Ubuntu	pyjwt	26.10	`2.10.1-4ubuntu1`	vulnerable
Ubuntu	pyjwt	26.10	`2.12.1-1`	vulnerable
Ubuntu	pyjwt	26.10	`2.13.0-1`	vulnerable
Ubuntu	pyjwt	26.10	`2.13.0-1ubuntu1`	vulnerable
Ubuntu	pyjwt	26.10	`2.13.0-1ubuntu1.1`	vulnerable
Ubuntu	pyjwt	26.04	`2.10.1-2`	vulnerable
Ubuntu	pyjwt	26.04	`2.10.1-3`	vulnerable
Ubuntu	pyjwt	26.04	`2.10.1-3build1`	vulnerable
Ubuntu	pyjwt	26.04	`2.10.1-4`	vulnerable
Ubuntu	pyjwt	26.04	`2.10.1-4ubuntu1`	vulnerable
Ubuntu	pyjwt	26.04	`2.10.1-4ubuntu1.1`	vulnerable
Ubuntu	pyjwt	26.04	`2.10.1-4ubuntu1.2`	vulnerable
Ubuntu	pyjwt	26.04	`2.10.1-4ubuntu1.3`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	pyjwt	source	sid	`2.14.0-1`	not yet assigned	Not reported	Not reported
Debian	pyjwt	source	forky	`2.14.0-1`	not yet assigned	Not reported	Not reported
Debian	pyjwt	source	trixie	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	pyjwt	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
PyPI	pyjwt	PyPI	Not reported	`2.14.0`	Not reported	GHSA-8WJV-2P76-3863	Not reported
PyPI	pyjwt	PyPI	Not reported	`2.14.0`	Not reported	PYSEC-2026-4142	Not reported

Notes

[bookworm] pyjwt: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[python3-jwt]Affected
Source package: [pyjwt]
Details (4)
- 2.6.0-1+deb12u1 · all · bookworm
  Affected
  nvd · pyjwt · debian · bookworm; nvd · pyjwt · debian · 12
- 2.6.0-1+deb12u1 · all · bookworm
  Affected
  nvd · pyjwt · debian · bookworm; nvd · pyjwt · debian · 12
- 2.6.0-1+deb12u1 · all · bookworm-security
  Affected
  nvd · pyjwt · debian · bookworm; nvd · pyjwt · debian · 12
- 2.6.0-1+deb12u1 · all · bookworm-security
  Affected
  nvd · pyjwt · debian · bookworm; nvd · pyjwt · debian · 12

[Debian 13 (Trixie)]

[python3-jwt]Affected
Source package: [pyjwt]
Details (4)
- 2.10.1-2+deb13u1 · all · trixie
  Affected
  nvd · pyjwt · debian · 13
- 2.10.1-2+deb13u1 · all · trixie
  Affected
  nvd · pyjwt · debian · 13
- 2.10.1-2+deb13u1 · all · trixie-security
  Affected
  nvd · pyjwt · debian · 13
- 2.10.1-2+deb13u1 · all · trixie-security
  Affected
  nvd · pyjwt · debian · 13
[python-jwt-doc]Affected
Source package: [pyjwt]
Details (4)
- 2.10.1-2+deb13u1 · all · trixie
  Affected
  nvd · pyjwt · debian · 13
- 2.10.1-2+deb13u1 · all · trixie
  Affected
  nvd · pyjwt · debian · 13
- 2.10.1-2+deb13u1 · all · trixie-security
  Affected
  nvd · pyjwt · debian · 13
- 2.10.1-2+deb13u1 · all · trixie-security
  Affected
  nvd · pyjwt · debian · 13

Observed: Oct 27, 2026, 5:02:06 AM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]