{"id":"DEBIAN-CVE-2026-92091","details":"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.","modified":"2026-09-17T21:00:23.284022347Z","published":"2026-09-16T08:16:40.583Z","upstream":["CVE-2026-92091"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-92091"}],"affected":[{"package":{"name":"python-jwcrypto","ecosystem":"Debian:12","purl":"pkg:deb/debian/python-jwcrypto?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.0-1","1.1.0-1+deb12u1","1.5.4-1","1.5.6-1","1.5.6-1.1","1.5.6-1.1~deb13u1","1.5.6-1.2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-92091.json"}},{"package":{"name":"python-jwcrypto","ecosystem":"Debian:13","purl":"pkg:deb/debian/python-jwcrypto?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.6-1","1.5.6-1.1","1.5.6-1.1~deb13u1","1.5.6-1.2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-92091.json"}},{"package":{"name":"python-jwcrypto","ecosystem":"Debian:14","purl":"pkg:deb/debian/python-jwcrypto?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.6-1","1.5.6-1.1","1.5.6-1.1~deb13u1","1.5.6-1.2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-92091.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}