medium5.9
CVE-2026-102274
PyJWT is a Python implementation of JSON Web Token standards.
Impact
PyJWT is a Python implementation of JSON Web Token standards. From 2.9.0 until 2.14.0, PyJWKSet does not catch the plain ValueError raised for malformed RSA JWK components by RSAAlgorithm.from_jwk in jwt/api_jwk.py. This occurs when a JWK Set contains a malformed RSA key alongside otherwise usable keys. As a result, one malformed member aborts construction of the entire PyJWKSet. Consequently, applications can experience authentication failures or request-level denial of service. This issue is fixed in version 2.14.0.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | PyJWT | >= 2.9.0, <= 2.13.0 | 2.14.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Pyjwt Project | Pyjwt | from 2.9.0 before 2.14.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-w6j9-cwv2-h6wq
- https://github.com/jpadilla/pyjwt/security/advisories/GHSA-w6j9-cwv2-h6wq
- https://nvd.nist.gov/vuln/detail/CVE-2026-102274
- https://github.com/jpadilla/pyjwt/commit/8915570a0bfda9f0ff0e34e7fb09bdb9d71580cf
- https://github.com/jpadilla/pyjwt/releases/tag/2.14.0