[pkg-vuln] CVE-2026-102265 in pyjwt@2.13.0 #899

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kert · 2026-09-30T06:01:59Z

kert commented

2026-09-30 06:01:59 +00:00

Severity: MEDIUM
Package: pyjwt @ 2.13.0
Fixed in: 2.14.0

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.

Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-102265

**Severity:** MEDIUM **Package:** `pyjwt` @ `2.13.0` **Fixed in:** `2.14.0` 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. **Reference:** https://nvd.nist.gov/vuln/detail/CVE-2026-102265

kert added this to the P21: Package Supply Chain — inventory, mirrors, drift, vuln scanning milestone 2026-09-30 06:01:59 +00:00

kert added the quality ci labels 2026-09-30 06:01:59 +00:00

kert closed this issue

2026-10-27 16:15:10 +00:00

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Reference: homelab/stack#899