{"id":"CVE-2026-16443","published":"2026-08-05T14:17:03.697","lastModified":"2026-08-10T18:52:14.427","description":"A flaw was found in the SAML metadata import functionality of the keycloak-services component, which is the core engine for identity brokering in Red Hat Build of Keycloak. When importing identity provider metadata that lacks specific usage attributes for keys, the system incorrectly disables signature validation for SAML responses even if a signing certificate is provided. This issue allows an unauthenticated attacker to forge a SAML response and gain unauthorized access to a user account by knowing their external identifier.","cvssScore":7.4,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","cwes":["CWE-347"],"vendors":["redhat"],"products":["build of keycloak"],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:50846","tags":["Vendor Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:50847","tags":["Vendor Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:50848","tags":["Vendor Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:50849","tags":["Vendor Advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-16443","tags":["Vendor Advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2503139","tags":["Issue Tracking","Vendor Advisory"]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"The flaw in Keycloak's SAML metadata import functionality allows unauthenticated attackers to forge SAML responses and gain unauthorized access by exploiting missing usage attributes for keys.","exploitability":"Exploitation requires knowledge of external identifiers but is relatively straightforward given the preconditions.","blast_radius":"If exploited, this could lead to unauthorized access to user accounts in affected Keycloak deployments.","remediation":"Update to the latest version of Red Hat Build of Keycloak that addresses this vulnerability.","tags":["auth-bypass","saml","keycloak","redhat"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-08-11T07:00:06.640Z"}}