Amazon Linux 2023 Security Advisory: ALAS2023-2026-3158
Advisory Released Date: 2026-10-12
Advisory Updated Date: 2026-10-12
Severity:
Important
Issue Overview:
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. (CVE-2026-92091)
Affected Packages:
python-jwcrypto
Issue Correction:
Run dnf update python-jwcrypto --releasever 2023.12.20261012 or dnf update --advisory ALAS2023-2026-3158 --releasever 2023.12.20261012 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
New Packages:
noarch:
python3-jwcrypto-1.4.2-46.amzn2023.0.2.noarch
src:
python-jwcrypto-1.4.2-46.amzn2023.0.2.src