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.

• CWE-345
• CWE-348

• https://github.com/jpadilla/pyjwt/commit/3cd9ceec33ced359decbad75b413ad668ae6332cPatch
• https://github.com/jpadilla/pyjwt/releases/tag/2.15.0Product, Release Notes
• https://github.com/jpadilla/pyjwt/security/advisories/GHSA-x33g-cr3x-6449Exploit, Vendor Advisory
• https://github.com/jpadilla/pyjwt/security/advisories/GHSA-x33g-cr3x-6449Exploit, Vendor Advisory

Published

Sep 28, 2026

Last Modified

Oct 6, 2026

Status

Analyzed

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