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.
History

Wed, 16 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 16 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Wed, 16 Sep 2026 07:45:00 +0000

Type Values Removed Values Added
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.
Title Jwcrypto: jwcrypto: denial of service via o(n^2) duplicate check on unbounded jwk key_ops array
First Time appeared Redhat
Redhat ansible Automation Platform
Redhat enterprise Linux
Redhat openshift Ai
Redhat openstack
Weaknesses CWE-407
CPEs cpe:/a:redhat:ansible_automation_platform:2
cpe:/a:redhat:openshift_ai
cpe:/a:redhat:openstack:16.2
cpe:/a:redhat:openstack:17.1
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat ansible Automation Platform
Redhat enterprise Linux
Redhat openshift Ai
Redhat openstack
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2026-09-16T07:34:08.840Z

Updated: 2026-09-16T14:55:19.799Z

Reserved: 2026-09-15T14:30:45.109Z

Link: CVE-2026-92091

cve-icon Vulnrichment

Updated: 2026-09-16T14:54:50.338Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-16T08:16:40.583

Modified: 2026-09-16T19:42:43.623

Link: CVE-2026-92091

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-16T07:04:07Z

Links: CVE-2026-92091 - Bugzilla