5.3
Medium
CVE-2026-101918 PyJWT is a Python implementation of JSON Web Token standards
Description
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| pyjwt 2.0 | 2.0.0a1 → < 2.15.0 | 2.15.0 |
References
- github.com github.com
- github.com github.com
- github.com github.com
Timeline
- Published
- Last modified
Other CVEs of pyjwt
The 22 CVEs of pyjwt →
CVE-2026-103001
PyJWT is a Python implementation of JSON Web Token standards
6.5
Medium
CVE-2026-102265
PyJWT is a Python implementation of JSON Web Token standards
5.3
Medium
CVE-2026-102275
PyJWT is a Python implementation of JSON Web Token standards
6.5
Medium
CVE-2026-102274
PyJWT is a Python implementation of JSON Web Token standards
5.9
Medium