Veille CVE
CVE-2026-102266
9.1 CritiqueDescription
PyJWT is a Python implementation of JSON Web Token standards. From 2.13.0 until 2.14.0, HMACAlgorithm.from_jwk is affected because PyJWK verification path used the decoded key without applying prepare_key validation. This occurs when a trusted JWK Set contains an oct entry with an empty k value. As a result, an attacker signs an HMAC token with the same zero-length key accepted by PyJWT. Consequently, forged token can carry arbitrary authenticated claims. This issue is fixed in version 2.14.0.
Produits concernés
Scores CVSS
| Version | Score | Source | Vecteur |
|---|---|---|---|
| 3.1 | 7.4 Élevée | security-advisories@github.com | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| 3.1 | 9.1 Critique | nvd@nist.gov (NVD) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
Faiblesses (CWE)
Références
- https://github.com/jpadilla/pyjwt/commit/f91ed44dd65baaf457f4b3353ed35e98a753934c Patch
- https://github.com/jpadilla/pyjwt/releases/tag/2.14.0 ProductRelease Notes
- https://github.com/jpadilla/pyjwt/security/advisories/GHSA-9j54-fg26-wv3r ExploitVendor Advisory
- https://github.com/jpadilla/pyjwt/security/advisories/GHSA-9j54-fg26-wv3r ExploitVendor Advisory