{"id":"EM-20261105-5JJN","url":"https://cyber.eventmonitor.net/incident/EM-20261105-5JJN/critical-saml-http-redirect-vulnerability-cve-2026-117691/","type":"cve","title":"Critical SAML HTTP-Redirect Vulnerability (CVE-2026-117691)","subtitle":"CVE-2026-117691","subject":"CVE-2026-117691","status":"Developing","severity":"critical","affected":[],"headline":null,"born":"2026-11-05T14:17:01.320Z","firstSignal":"2026-11-05T00:00:00.000Z","lastSignal":"2026-11-05T14:17:01.320Z","updated":"2026-11-06T00:58:29.349Z","revision":1,"life":[{"status":"Born","at":"2026-11-05T14:17:01.320Z","why":"second independent source: C6 NVD CVE API 2.0"},{"status":"Developing","at":"2026-11-05T14:17:01.320Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-05T00:00:00.000Z","what":"First signal: C41 Red Hat Security Data"},{"at":"2026-11-05T14:17:01.320Z","what":"Born: second source, C6 NVD CVE API 2.0. Page EM-20261105-5JJN created."},{"at":"2026-11-05T14:17:01.320Z","what":"Severity raised to Critical by C6"}],"stages":[{"name":"Disclosed","at":"2026-11-05T14:17:01.320Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-11-05T14:17:01.320Z","detail":"CVSS 9.1"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":"2026-11-05T00:00:00.000Z","detail":"C41 published"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-11-05T00:00:00.000Z","source":"C41","sourceName":"Red Hat Security Data","role":"Vendor","severity":3,"title":"Red Hat: CVE-2026-117691 (important)","text":"keycloak-services: keycloak-services: SAML redirect binding signature bypass via percent-encoded parameter names","url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-117691.json"},{"at":"2026-11-05T14:17:01.320Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":4,"title":"CVE-2026-117691 (CVSS 9.1)","text":"A flaw was found in the SAML HTTP-Redirect binding implementation of Keycloak. The issue occurs because the server processes percent-encoded parameter names (like %53AMLResponse) while the signature verification logic only checks literal parameter names. An attacker can use this discrepancy to provide a crafted, unsigned SAML message that the server processes instead of a legitimately signed one, leading to full account takeover of federated users.","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-117691"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-05T14:17:01.320","score":9.1,"severity":"CRITICAL","desc":"A flaw was found in the SAML HTTP-Redirect binding implementation of Keycloak. The issue occurs because the server processes percent-encoded parameter names (like %53AMLResponse) while the signature verification logic only checks literal parameter names. An attacker can use this discrepancy to provi","product":"","seen":1793909142558},"kev":null,"epss":null,"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}