AZL-105239
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-105239.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-105239
- Upstream
- Published
- 2026-09-28T21:17:14Z
- Modified
- 2026-10-01T14:15:54Z
- Summary
- CVE-2026-102266 affecting package python-jwt 2.13.0-1
- Details
-
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.
- References