{"id":"CVE-2026-109082","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-109082","generatedAt":"2026-10-28T03:59:14.169Z","title":"The issue occurs because Keycloak fails to verify that a client is authorized to use the CIBA flow, allowing public clients to bypass security requirements.","description":"A flaw was found in the Client-Initiated Backchannel Authentication CIBA implementation within the keycloak-services component of Keycloak. This component handles advanced authentication flows where a client initiates a login on behalf of a user. The issue occurs because Keycloak fails to verify that a client is authorized to use the CIBA flow, allowing public clients to bypass security requirements. An attacker could use this flaw to trick a user into approving a login request, eventually gaining full access to the users account without needing a client secret.","published":"2026-10-12T07:16:36.000Z","lastModified":"2026-10-15T16:33:26.000Z","status":"Awaiting Analysis","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":6.8,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N"},"cwe":["CWE-287"],"affected":[],"epss":{"score":0.00248,"percentile":0.15979,"date":"2026-10-27","history":[{"date":"2026-10-12","score":0.00248,"percentile":0.14809}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.25%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-12T07:16:36.000Z","detail":{"score":"6.8","severity":"MEDIUM","publishedAt":"2026-10-12T07:16:36.303Z"},"summary":"New CVE, medium severity (CVSS 6.8)."}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-109082","source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2549478","source":"secalert@redhat.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-109082","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}