{"id":"OESA-2026-4066","summary":"python-jwcrypto security update","details":"Implements JWK, JWS, JWE specifications with python-cryptography\r\n\r\nSecurity Fix(es):\n\nA 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.(CVE-2026-92091)","modified":"2026-09-25T01:45:11.310836537Z","published":"2026-09-25T01:28:00Z","upstream":["CVE-2026-92091"],"database_specific":{"severity":"Medium"},"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4066"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92091"}],"affected":[{"package":{"name":"python-jwcrypto","ecosystem":"openEuler:22.03-LTS-SP4","purl":"pkg:rpm/openEuler/python-jwcrypto&distro=openEuler-22.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.2-5.oe2203sp4"}]}],"ecosystem_specific":{"src":["python-jwcrypto-1.4.2-5.oe2203sp4.src.rpm"],"noarch":["python3-jwcrypto-1.4.2-5.oe2203sp4.noarch.rpm"]},"database_specific":{"source":"https://repo.openeuler.org/security/data/osv/OESA-2026-4066.json"}},{"package":{"name":"python-jwcrypto","ecosystem":"openEuler:24.03-LTS-SP1","purl":"pkg:rpm/openEuler/python-jwcrypto&distro=openEuler-24.03-LTS-SP1"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.5.0-5.oe2403sp1"}]}],"ecosystem_specific":{"noarch":["python-jwcrypto-help-1.5.0-5.oe2403sp1.noarch.rpm","python3-jwcrypto-1.5.0-5.oe2403sp1.noarch.rpm"],"src":["python-jwcrypto-1.5.0-5.oe2403sp1.src.rpm"]},"database_specific":{"source":"https://repo.openeuler.org/security/data/osv/OESA-2026-4066.json"}},{"package":{"name":"python-jwcrypto","ecosystem":"openEuler:24.03-LTS-SP3","purl":"pkg:rpm/openEuler/python-jwcrypto&distro=openEuler-24.03-LTS-SP3"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.5.0-5.oe2403sp3"}]}],"ecosystem_specific":{"noarch":["python-jwcrypto-help-1.5.0-5.oe2403sp3.noarch.rpm","python3-jwcrypto-1.5.0-5.oe2403sp3.noarch.rpm"],"src":["python-jwcrypto-1.5.0-5.oe2403sp3.src.rpm"]},"database_specific":{"source":"https://repo.openeuler.org/security/data/osv/OESA-2026-4066.json"}},{"package":{"name":"python-jwcrypto","ecosystem":"openEuler:24.03-LTS-SP4","purl":"pkg:rpm/openEuler/python-jwcrypto&distro=openEuler-24.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.5.0-5.oe2403sp4"}]}],"ecosystem_specific":{"noarch":["python-jwcrypto-help-1.5.0-5.oe2403sp4.noarch.rpm","python3-jwcrypto-1.5.0-5.oe2403sp4.noarch.rpm"],"src":["python-jwcrypto-1.5.0-5.oe2403sp4.src.rpm"]},"database_specific":{"source":"https://repo.openeuler.org/security/data/osv/OESA-2026-4066.json"}},{"package":{"name":"python-jwcrypto","ecosystem":"openEuler:20.03-LTS-SP4","purl":"pkg:rpm/openEuler/python-jwcrypto&distro=openEuler-20.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.5.0-6.oe2003sp4"}]}],"ecosystem_specific":{"noarch":["python3-jwcrypto-0.5.0-6.oe2003sp4.noarch.rpm"],"src":["python-jwcrypto-0.5.0-6.oe2003sp4.src.rpm"]},"database_specific":{"source":"https://repo.openeuler.org/security/data/osv/OESA-2026-4066.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"}]}