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.
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Affected Vendors & Products
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History
Wed, 16 Sep 2026 16:30:00 +0000
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ssvc
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Wed, 16 Sep 2026 12:15:00 +0000
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threat_severity
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threat_severity
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Wed, 16 Sep 2026 07:45:00 +0000
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| 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 |
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| 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 |
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| Vendors & Products |
Redhat
Redhat ansible Automation Platform Redhat enterprise Linux Redhat openshift Ai Redhat openstack |
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cvssV3_1
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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
Updated: 2026-09-16T14:54:50.338Z
Status : Awaiting Analysis
Published: 2026-09-16T08:16:40.583
Modified: 2026-09-16T19:42:43.623
Link: CVE-2026-92091