CVEvulnerability
CVE-2026-102265
5.3 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2026-09-28
- Last modified
- 2026-10-07
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Weaknesses
- CWE-674
Description
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.
Affected configurations
• pyjwt project pyjwt 2.13.0
Related
Weakness · CWE (1)
- CWE-674 Uncontrolled Recursion weakness
References
- https://github.com/jpadilla/pyjwt/commit/06573692ebcdec8831c3927513b3e87c31fbbb62 Patch
- https://github.com/jpadilla/pyjwt/releases/tag/2.14.0 Product, Release Notes
- https://github.com/jpadilla/pyjwt/security/advisories/GHSA-8wjv-2p76-3863 Exploit, Mitigation, Vendor Advisory
- https://github.com/jpadilla/pyjwt/security/advisories/GHSA-8wjv-2p76-3863 Exploit, Mitigation, Vendor Advisory