Is CVE-2026-102274 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-102274?

CVE-2026-102274 has a CVSS v3 severity of MEDIUM (5.9).

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CVE-2026-102274

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.