What’s Vulnerable › Vulnerabilities

CVE-2026-92091: Jwcrypto: jwcrypto: denial of service via o(n^2) duplicate check on unbounded jwk key_ops array

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-16 · updated 2026-09-16
• Weakness: CWE-407

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.

Affected products

• Red Hat Ansible Automation Platform 2: all versions
• Red Hat Enterprise Linux 10: all versions
• Red Hat Enterprise Linux 7: all versions
• Red Hat Enterprise Linux 8: all versions
• Red Hat Enterprise Linux 9: all versions
• Red Hat OpenShift AI (RHOAI): all versions
• Red Hat OpenStack Platform 16.2: all versions
• Red Hat OpenStack Platform 17.1: all versions

References

• 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

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