Vulnerability Details CVE-2026-102275
PyJWT is a Python implementation of JSON Web Token standards. From 2.1.0 until 2.15.0, PyJWT OKPAlgorithm.from_jwk in jwt/algorithms.py is affected because private-JWK import path does not compare the public key derived from d with x. This occurs when an OKP private JWK supplies non-corresponding x and d components. As a result, identity derived from x can differ from operations performed with d. Consequently, if an integration also accepts private key parameters from a proof header without rejecting them, an attacker may use a stolen sender-constrained token without the legitimate private key. This issue is fixed in version 2.15.0.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 3.1%
CVSS Severity
CVSS v3 Score 6.5
References
Products affected by CVE-2026-102275
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cpe:2.3:a:pyjwt_project:pyjwt:*