CVEvulnerability

CVE-2026-92091

5.9 MEDIUM Published 2026-09-16 Modified 2026-09-16 Official page ↗
Status
Awaiting Analysis
Published
2026-09-16
Last modified
2026-09-16
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-407

Description

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.

Related

Weakness · CWE (1)

  • CWE-407 Inefficient Algorithmic Complexity weakness

References