CVE-2026-102275

Medium

Description

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.

SeverityMedium

CVSS6.5

Exploit probability—

ProductPyjwt

PublishedSep 28, 2026

First seenSep 28, 2026

Weakness typeCWE-345CWE-345 CWE-348CWE-348

How to fix

Update

pyjwt_project pyjwt2.15.0 or later
pyjwt2.15.0 or later

Affected products

Product	Affected versions	Fixed in
pyjwt_project pyjwt	2.1.0 ≤ v < 2.15.0	2.15.0
pyjwtPyPI	2.1.0 ≤ v < 2.15.0	2.15.0

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