{"id":"CVE-2026-84185","title":"A flaw was found in the jwcrypto library, which is used for implementing Javascript Object Signing and Encryption (JOSE) standards","summary":"A flaw was found in the jwcrypto library, which is used for implementing Javascript Object Signing and Encryption (JOSE) standards. The issue occurs when the library verifies a General JSON Serialization JWS using a set of keys. Due to a…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N","cwe":["CWE-347"],"published":"2026-09-03","updated":"2026-09-08","sourceUpdated":"2026-09-08T19:08:15.590","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-84185","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-84185","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2526729","label":"secalert@redhat.com"}],"tags":["nvd"],"epss":0.00087,"epssPercentile":0.00416,"ingestedAt":"2026-09-08T20:10:03.160Z","slug":"CVE-2026-84185","body":"## Overview\n\nA flaw was found in the jwcrypto library, which is used for implementing Javascript Object Signing and Encryption (JOSE) standards. The issue occurs when the library verifies a General JSON Serialization JWS using a set of keys. Due to a coding error, the library fails to correctly identify the specific key ID (kid) and may instead accept a signature made by any valid key in the set. This can allow an attacker with a valid key to bypass authorization checks in applications that rely on the key ID to identify specific tenants or users.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":32.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}