Name: CVE-2026-102274: Improper Handling of Exceptional Conditions
Creator: Rapid7
Published: 2026-09-28T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-102274, CWE-755, CVSS 7.5, EPSS 0.00389

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.

CVSS Details

CVSS 3.1 Base Score: 7.5
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Redhat_linux	—	No solution exists	Oct 13, 2026	Sep 28, 2026
Ubuntu	—	Upgrade python3-jwt (Ubuntu Pro)Upgrade python3-jwtUpgrade python-jwt (Ubuntu Pro)	Oct 20, 2026	Oct 19, 2026

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CVSS Details

Covered by Rapid7

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