CVE-2026-102266

Published 28 September 2026 · tracked since 29 September 2026

Description

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

References

• NVD — National Vulnerability Database
• CVE.org record (MITRE)
• CISA Known Exploited Vulnerabilities catalog

Latest tracked vulnerabilities

• CVE-2026-102265 MEDIUM 5.3
• CVE-2026-102267 HIGH 7.4
• CVE-2026-102268 CRITICAL 9.1
• CVE-2026-102269 MEDIUM 4.8
• CVE-2026-101917 MEDIUM 5.3
• CVE-2026-101918 MEDIUM 5.3
• CVE-2026-100371
• CVE-2026-100370 MEDIUM 4.7
• CVE-2026-86950 HIGH 8.8
• CVE-2026-87741 HIGH 8.8

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