Bug 2542691 (CVE-2026-102274) - CVE-2026-102274 pyjwt: pyjwt: Denial of Service via malformed RSA key in JWK set
Summary: CVE-2026-102274 pyjwt: pyjwt: Denial of Service via malformed RSA key in JWK set
Keywords:
Status: NEW
Alias: CVE-2026-102274
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-28 20:51 UTC by OSIDB Bzimport
Modified: 2026-10-08 18:46 UTC (History)
112 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-09-28 20:51:23 UTC 
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.
Note You need to log in before you can comment on or make changes to this bug.