{"id":"CVE-2024-9666","url":"https://www.cyber-defence.io/tools/cve/CVE-2024-9666","generatedAt":"2026-10-28T03:23:53.832Z","title":"A vulnerability was found in the Keycloak Server.","description":"A vulnerability was found in the Keycloak Server. The Keycloak Server is vulnerable to a denial of service (DoS) attack due to improper handling of proxy headers. When Keycloak is configured to accept incoming proxy headers, it may accept non-IP values, such as obfuscated identifiers, without proper validation. This issue can lead to costly DNS resolution operations, which an attacker could exploit to tie up IO threads and potentially cause a denial of service.\nThe attacker must have access to send requests to a Keycloak instance that is configured to accept proxy headers, specifically when reverse proxies do not overwrite incoming headers, and Keycloak is configured to trust these headers.","published":"2024-11-25T08:15:11.000Z","lastModified":"2026-09-21T06:16:59.000Z","status":"Deferred","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":4.7,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-444"],"affected":[],"epss":{"score":0.00403,"percentile":0.34272,"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":"low","text":"Lower severity and a low EPSS score (0.40%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://access.redhat.com/errata/RHSA-2024:10175","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:10176","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:10177","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:10178","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2024-9666","source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2317440","source":"secalert@redhat.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2024-9666","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."}