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.
Published: 2026-09-16
Score: 5.9 Medium
EPSS: n/a
KEV: No
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Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

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History

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'}


Subscriptions

Redhat Ansible Automation Platform Enterprise Linux Openshift Ai Openstack
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

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

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

Link: CVE-2026-92091

cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses