CVE-2026-101918

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.

• CWE-248

• https://github.com/jpadilla/pyjwt/commit/5fde08a6cf906aa7698de2d6391d88b73006b17b
• https://github.com/jpadilla/pyjwt/releases/tag/2.15.0
• https://github.com/jpadilla/pyjwt/security/advisories/GHSA-42vr-xj54-vc7v

Published

Sep 28, 2026

Last Modified

Sep 29, 2026

Status

Received

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-101912ip-address is a library for parsing and manipulating IPv4 an…6.3
• CVE-2026-101913ip-address is a library for parsing and manipulating IPv4 an…6.3
• CVE-2026-101914@grpc/grpc-js implements the core functionality of gRPC pure…6.5
• CVE-2026-101915@grpc/grpc-js implements the core functionality of gRPC pure…3.7
• CVE-2026-101916@grpc/grpc-js implements the core functionality of gRPC pure…7.4
• CVE-2026-101917PyJWT is a Python implementation of JSON Web Token standards…5.3
• CVE-2026-10192A vulnerability was identified in Tenda W12 3.0.0.7(4763). T…8.8
• CVE-2026-10193A security flaw has been discovered in OFCMS up to 1.1.3. Th…6.3
• CVE-2026-10194A weakness has been identified in OFFIS DCMTK 3.7.0. This af…6.3
• CVE-2026-10195The FS-Poster plugin for WordPress is vulnerable to Remote C…8.8
• CVE-2026-10196The Mail Mint – Email Marketing, Newsletter, Email Automatio…9.8
• CVE-2026-10197A vulnerability was detected in Assimp up to 6.0.4. Affected…3.3