Improper Verification of Cryptographic Signature Affecting python3-jwt+crypto package, versions <0:2.4.0-1.amzn2023.0.6


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.17% (6th percentile)

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  • Snyk IDSNYK-AMZN2023-PYTHON3JWTCRYPTO-21702985
  • published25 Oct 2026
  • disclosed28 Sept 2026

Introduced: 28 Sep 2026

CVE-2026-102275  (opens in a new tab)
CWE-347  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 python3-jwt+crypto to version 0:2.4.0-1.amzn2023.0.6 or higher.
This issue was patched in ALAS2023-2026-3298.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-jwt+crypto package and not the python3-jwt+crypto package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1