{"id":"CVE-2026-103884","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-103884","generatedAt":"2026-10-28T01:03:28.336Z","title":"An attacker can provide a specially crafted certificate that causes the server to attempt to read sensitive files from the local system or exhaust memory by loading extremely large files, potentially leading to information disclosure or a system crash.","description":"A flaw was found in the X.509 client certificate authenticator of Keycloak. When CRL Distribution Point checking is enabled, the server fails to properly validate the file paths provided in a client certificate. An attacker can provide a specially crafted certificate that causes the server to attempt to read sensitive files from the local system or exhaust memory by loading extremely large files, potentially leading to information disclosure or a system crash.","published":"2026-10-01T18:17:13.000Z","lastModified":"2026-10-01T20:36:15.000Z","status":"Awaiting Analysis","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H"},"cwe":["CWE-22"],"affected":[],"epss":{"score":0.0023,"percentile":0.1377,"date":"2026-10-26","history":[{"date":"2026-10-02","score":0.00213,"percentile":0.10513}]},"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 (0.23%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-01T18:17:13.000Z","detail":{"score":"6.5","severity":"MEDIUM","publishedAt":"2026-10-01T18:17:12.683Z"},"summary":"New CVE, medium severity (CVSS 6.5)."}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-103884","source":"secalert@redhat.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-103884","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."}