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CVE-2026-102266
HIGH(7.4)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Risk Signal Score19/100 — NIEDRIG
- CVSS 7.4 — Hoch
Erwähnungen (letzte 60 Tage)
Artikel
EPSS-Score
0.2%
Exploit-Wahrscheinlichkeit (30 Tage)
CVSS Score
7.4
Technische Schwere
Beschreibung
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.
Betroffene Produkte
- cpe:2.3:a:pyjwt_project:pyjwt:2.13.0:*:*:*:*:*:*:*
GitHub Advisories
GHSA-9j54-fg26-wv3rHIGH
PyJWT: PyJWK accepts empty HMAC keys, bypassing PyJWT's empty-key validation
pip/PyJWT→ 2.14.0
GitHub Advisory