{"id":"CVE-2026-9689","title":"A flaw was found in Keycloak, an open-source identity and access management solution","summary":"A flaw was found in Keycloak, an open-source identity and access management solution. When a client application is configured to accept broad redirect Uniform Resource Identifiers (URIs), a remote attacker can manipulate the authenticati…","severity":"medium","cvss":4.2,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","cwe":["CWE-1288"],"vendor":"redhat","product":"build_of_keycloak","affected":["build_of_keycloak"],"published":"2026-05-27","updated":"2026-08-05","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-9689","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:50846","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:50847","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:50848","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:50849","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-9689","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2481845","label":"secalert@redhat.com"}],"tags":["nvd"],"epss":0.00322,"epssPercentile":0.25353,"ingestedAt":"2026-08-06T05:56:21.584Z","slug":"CVE-2026-9689","body":"## Overview\n\nA flaw was found in Keycloak, an open-source identity and access management solution. When a client application is configured to accept broad redirect Uniform Resource Identifiers (URIs), a remote attacker can manipulate the authentication process by crafting a special web address. If a user clicks this link, the client application might incorrectly prioritize attacker-controlled information over legitimate data. This vulnerability, known as HTTP parameter pollution, could allow an attacker to bypass security measures or gain unauthorized access to resources.\n\n## Affected\n\n- `build_of_keycloak`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":23,"depthScoreParts":{"impact":23.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}