Algorithmic Complexity Affecting python313-jwcrypto package, versions <1.5.6-160000.5.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.57% (46th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-SLES1600-PYTHON313JWCRYPTO-21357621
  • published21 Oct 2026
  • disclosed9 Oct 2026

Introduced: 9 Oct 2026

NewCVE-2026-92091  (opens in a new tab)
CWE-407  (opens in a new tab)

How to fix?

Upgrade SLES:16.0.0 python313-jwcrypto to version 1.5.6-160000.5.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python313-jwcrypto package and not the python313-jwcrypto package as distributed by SLES. See How to fix? for SLES:16.0.0 relevant fixed versions and status.

A flaw was found in jwcrypto. The JWK.import_key() function validates the key_ops JWK member for duplicate values using an algorithm with O(n^2) time complexity, and the length of key_ops is not bounded. A remote, unauthenticated attacker can supply a JWK with a large key_ops array to an application that passes attacker-controlled key material to a public key-import API (reachable via ECDH-ES key agreement, OIDC dynamic client registration, DPoP, or ACME account key registration, among others) to consume excessive CPU time, resulting in a denial of service.

CVSS Base Scores

version 3.1