{"id":"CVE-2026-18212","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-18212","generatedAt":"2026-10-28T02:21:24.520Z","title":"An unauthenticated attacker can exploit this by sending repeated malformed SAML requests, leading to native memory exhaustion and a denial of service.","description":"A flaw was found in the SAML Redirect Binding implementation of Keycloak, an open-source identity and access management solution. The issue occurs because the custom DEFLATE compression and decompression helpers fail to release native zlib memory after use. An unauthenticated attacker can exploit this by sending repeated malformed SAML requests, leading to native memory exhaustion and a denial of service.","published":"2026-09-16T15:17:33.000Z","lastModified":"2026-09-16T19:42:44.000Z","status":"Awaiting Analysis","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-401"],"affected":[],"epss":{"score":0.00704,"percentile":0.5304,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.70%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:68276","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:68277","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:68278","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:68280","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-18212","source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2508307","source":"secalert@redhat.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-18212","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."}