5.3Mittel
CVE-2026-101918PyJWT: Unauthenticated RecursionError DoS in pre-verification payload parse (PyJWKClient.get_signing_key_from_jwt / verify_signature=False)
Beschreibung
PyJWT is a Python implementation of JSON Web Token standards. From 2.0.0a1 until 2.15.0, PyJWT PyJWKClient.get_signing_key_from_jwt is affected because payload parser catches ValueError but not RecursionError. This occurs when an attacker-controlled recursively nested payload reaches json.loads. As a result, documented PyJWT exception handling does not contain the failure. Consequently, an unauthenticated request can raise an exception that may produce an HTTP 500 response. The advisory-defined affected implementation also includes jwt/api_jwt.py, verify_signature=False. This issue is fixed in version 2.15.0.
Schwachstellentyp (CWE):
CWE-248
Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.
Betroffene Produkte und Versionen
| Hersteller | Produkt | Versionen | |
|---|---|---|---|
| jpadilla | pyjwt | >= 2.0.0a1, < 2.15.0 | |
| pyjwt project | pyjwt | 2.0.0 – < 2.15.0 |
Referenzen und Patches
- https://github.com/jpadilla/pyjwt/security/advisories/GHSA-42vr-xj54-vc7v ExploitMitigationVendor Advisory
- https://github.com/jpadilla/pyjwt/commit/5fde08a6cf906aa7698de2d6391d88b73006b17b Patch
- https://github.com/jpadilla/pyjwt/releases/tag/2.15.0 ProductRelease Notes
CPE-Treffer (NVD) (1)
cpe:2.3:a:pyjwt_project:pyjwt:*:*:*:*:*:*:*:*≥ 2.0.0 < 2.15.0