CVE-2026-102265
MEDIUMCVSS 5.3Description
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.
Timeline
Published:September 28th, 2026 9:17 PM
Last modified:October 7th, 2026 8:57 PM
CVSS Scoring
CVSS v3: 5.3 (MEDIUM)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected Software
From NVD CPE configuration data
Vendors
pyjwt_project
Products
pyjwt
Weaknesses (CWE)
References & Reports
Advisories, patches, and third-party reports
- https://github.com/jpadilla/pyjwt/commit/06573692ebcdec8831c3927513b3e87c31fbbb62Patch
- https://github.com/jpadilla/pyjwt/releases/tag/2.14.0Product
- https://github.com/jpadilla/pyjwt/security/advisories/GHSA-8wjv-2p76-3863Exploit
- https://github.com/jpadilla/pyjwt/security/advisories/GHSA-8wjv-2p76-3863Exploit
Source: NIST NVD · Data may lag official sources by up to one minute