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CVE-2026-102274

PyJWT: Malformed RSA JWK aborts parsing of an entire JWK Set PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
jpadilla / pyjwtaffected >= 2.9.0, < 2.14.0

CWE

CWE-755

References

ADP enrichment

CISA-ADP

No English description supplied.