CVE-2026-102274

Published: Sep 28, 2026Modified: Oct 6, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: NVD

Description

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 (1)

Products: Pyjwt Project: Pyjwt

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Pyjwt Project Pyjwt	2.9.0 ≤ version < 2.14.0

Related CWEs

Improper Handling of Exceptional Conditions

The product does not handle or incorrectly handles an exceptional condition.

References (4)

https://github.com/jpadilla/pyjwt/commit/8915570a0bfda9f0ff0e34e7fb09bdb9d71580cf

Source: security-advisories@github.com

Patch

https://github.com/jpadilla/pyjwt/releases/tag/2.14.0

Source: security-advisories@github.com

ProductRelease Notes

https://github.com/jpadilla/pyjwt/security/advisories/GHSA-w6j9-cwv2-h6wq

Source: security-advisories@github.com

ExploitMitigationVendor Advisory

https://github.com/jpadilla/pyjwt/security/advisories/GHSA-w6j9-cwv2-h6wq

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

ExploitMitigationVendor Advisory

Timeline

No history available yet.