CVE-2026-102274
highPyJWT is a Python implementation of JSON Web Token standards.
Vendor / product: Pyjwt Project — pyjwt
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
7.5
7.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-09-28 21:17
Modified: 2026-10-06 18:25
NVD status: Analyzed
Last synced 2 days ago
Verified against the source API 2026-10-27 06:56 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
pyjwt_project / pyjwt ≥2.9.0 <2.14.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://github.com/jpadilla/pyjwt/commit/8915570a0bfda9f0ff0e34e7fb09bdb9d71580cf
Patch / mitigation: https://github.com/jpadilla/pyjwt/security/advisories/GHSA-w6j9-cwv2-h6wq
Patch / mitigation: https://github.com/jpadilla/pyjwt/security/advisories/GHSA-w6j9-cwv2-h6wq
References
- https://github.com/jpadilla/pyjwt/commit/8915570a0bfda9f0ff0e34e7fb09bdb9d71580cf security-advisories@github.com
- https://github.com/jpadilla/pyjwt/releases/tag/2.14.0 security-advisories@github.com
- https://github.com/jpadilla/pyjwt/security/advisories/GHSA-w6j9-cwv2-h6wq security-advisories@github.com
- https://github.com/jpadilla/pyjwt/security/advisories/GHSA-w6j9-cwv2-h6wq 134c704f-9b21-4f2e-91b3-4a467353bcc0
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:56 UTC · record ↗