CVE-2026-92091

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.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-92091
https://bugzilla.redhat.com/show_bug.cgi?id=2533849
https://github.com/latchset/jwcrypto/security/advisories/GHSA-pwgw-f7xr-863h
https://github.com/latchset/jwcrypto/security/advisories/GHSA-pwgw-f7xr-863h

Configurations

No configuration.

History

16 Sep 2026, 15:18

Type	Values Removed	Values Added
References	~~() https://github.com/latchset/jwcrypto/security/advisories/GHSA-pwgw-f7xr-863h -~~	() https://github.com/latchset/jwcrypto/security/advisories/GHSA-pwgw-f7xr-863h -

Information

Published : 2026-09-16 08:16

Updated : 2026-09-16 15:18

NVD link : CVE-2026-92091

Mitre link : CVE-2026-92091

CVE.ORG link : CVE-2026-92091

JSON object : View

Products Affected

No product.

CWE

CWE-407

Inefficient Algorithmic Complexity

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"https://access.redhat.com/security/cve/CVE-2026-92091", "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2533849", "source": "secalert@redhat.com"}, {"url": "https://github.com/latchset/jwcrypto/security/advisories/GHSA-pwgw-f7xr-863h", "source": "secalert@redhat.com"}, {"url": "https://github.com/latchset/jwcrypto/security/advisories/GHSA-pwgw-f7xr-863h", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Received", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-407"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-09-16T15:18:59.777", "sourceIdentifier": "secalert@redhat.com"}