Is there a public exploit for CVE-2026-102274?

No public exploit for CVE-2026-102274 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-102274?

CVE-2026-102274 scores CVSS 7.5 (v3.1), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.55%.

What does CVE-2026-102274 affect?

CVE-2026-102274 affects jpadilla PyJWT.

7.5 High

PyJWT is a Python implementation of JSON Web Token standards.

CVE-2026-102274

Summary A malformed RSA JWK inside a JWK Set aborts parsing of the entire set instead of being skipped, because RSAAlgorithm.fromjwk can raise a plain ValueError that isn't caught by PyJWKSet's per-key error-skipping logic. Affected component / version Package: PyJWT (PyPI, ecosystem pip) Files: jwt/apijwk.py (PyJWK.init, PyJWKSet.init), jwt/algorithms.py (RSAAlgorithm.fromjwk) Confirmed present in the master branch as of 2026-09-05 (commit 7144e4534c34810f4525dc4578a32addd8212cff, tag 2.13.0). Directly verified identical in tags 2.9.0, 2.10.0, 2.11.0, 2.12.0, 2.12.1, 2.13.0 -- the vulnerable call and the except PyJWTError guard are unchanged across all six releases. Not verified against any release prior to 2.9.0. Details PyJWKSet.init (jwt/apijwk.py:145-152) iterates each key in a JWK Set: python for key in keys: try: self.keys.append(PyJWK(key)) except PyJWTError as error: if isinstance(error, MissingCryptographyError): raise error skip unusable keys continue PyJWK.init (apijwk.py:82) calls self.Algorithm.fromjwk(self.jwkdata) with no try/except of its own. For an RSA JWK, this dispatches to RSAAlgorithm.fromjwk (jwt/algorithms.py:539-586). When the JWK supplies d, e, n without…

Assessment

CVSS: 7.5 (v3.1)
Severity: High
EPSS: 0.55% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 28 September 2026
Last updated: 6 October 2026
Affected: jpadilla · pyjwt · PyJWT
Weakness: CWE-755
Assigner: security-advisories@github.com

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

At the source

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