CVE-2026-102274Medium· 5.9▾ TwilightPoC availablePyJWT 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 J…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 32.5 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 29.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.4%
Exploit / PoC code exists
Last analysed / modified upstream
0.4% → 0.5%
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.
pyjwt >= 2.9.0, < 2.14.0Upgrade past the affected range:
pyjwt 2.14.0Affected packages:
PyJWT >= 2.9.0, <= 2.13.0Patched in:
PyJWT 2.14.0Source: https://github.com/advisories/GHSA-w6j9-cwv2-h6wq
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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