{"id":"CVE-2026-105306","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-105306","generatedAt":"2026-10-28T03:38:57.734Z","title":"An attacker with a valid Initial Access Token can register a client that bypasses audience checks during token introspection.","description":"A flaw was found in the Dynamic Client Registration flow of the Keycloak identity and access management server. The issue occurs because the registration process fails to filter security-sensitive client attributes when a new client is created. An attacker with a valid Initial Access Token can register a client that bypasses audience checks during token introspection. This allows the attacker to view sensitive identity information, roles, and session details from access tokens belonging to other applications in the same realm.","published":"2026-10-05T06:16:59.000Z","lastModified":"2026-10-06T15:09:20.000Z","status":"Awaiting Analysis","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-862"],"affected":[],"epss":{"score":0.00222,"percentile":0.12636,"date":"2026-10-27","history":[{"date":"2026-10-05","score":0.00221,"percentile":0.11538}]},"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 (0.22%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-05T06:16:59.000Z","detail":{"score":"6.5","severity":"MEDIUM","publishedAt":"2026-10-05T06:16:58.530Z"},"summary":"New CVE, medium severity (CVSS 6.5)."}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-105306","source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2545802","source":"secalert@redhat.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-105306","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."}