{"id":"BIT-keycloak-2026-15571","summary":"Flaw in the legacy client-initiated account-linking endpoint of Keycloak","details":"A flaw was found in the legacy client-initiated account-linking endpoint of Keycloak, a widely used open-source identity and access management solution. The mechanism used to protect the account-linking process from unauthorized requests relies on a hash that can be predicted by a malicious OIDC client. By tricking a user into authenticating, an attacker-controlled client can forge a valid linking URL to connect the victim's account to an attacker's external identity. This results in a full account takeover, allowing the attacker to log in as the victim.","aliases":["CVE-2026-15571"],"modified":"2026-08-26T11:15:06.505464719Z","published":"2026-08-25T10:46:44.542Z","database_specific":{"cpes":["cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*","cpe:2.3:a:keycloak:keycloak:*:*:*:*:*:*:*:*"],"severity":"High"},"references":[{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:56523"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:56524"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-15571"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-15571"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2499591"}],"affected":[{"package":{"name":"keycloak","ecosystem":"Bitnami","purl":"pkg:bitnami/keycloak"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"26.7.2"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/keycloak/BIT-keycloak-2026-15571.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N"}]}],"schema_version":"1.9.0"}