GHSA-4hx9-48xh-5mxr

Keycloak LDAP User Federation provider enables admin-triggered untrusted Java deserialization

Source: GitHub Advisory Database (reviewed) Moderate CVE-2025-13467

Packages

Ecosystem	Package	Affected	Fixed in
Maven	org.keycloak:keycloak-ldap-federation	>= 26.3.0, < 26.4.6	26.4.6
Maven	org.keycloak:keycloak-ldap-federation	< 26.2.11	26.2.11

Details

As written in the advisory (Markdown source, shown as plain text).

A flaw was found in the Keycloak LDAP User Federation provider. This vulnerability allows an authenticated realm administrator to trigger deserialization of untrusted Java objects via a malicious LDAP server configuration. ### Mitigation Disable LDAP referrals in all LDAP user providers in all realms if projects cannot upgrade to the patched versions.

References

External links from the advisory. They lead to third-party sites.

https://github.com/keycloak/keycloak/security/advisories/GHSA-4hx9-48xh-5mxr web
https://nvd.nist.gov/vuln/detail/CVE-2025-13467 advisory
https://github.com/keycloak/keycloak/issues/44478 web
https://github.com/keycloak/keycloak/commit/754c070cf8ca187dcc71f0f72ff3130ff2195328 web
https://github.com/keycloak/keycloak/commit/b90fec41ff17a70858d830750156a8a2e13ddb82 web
https://access.redhat.com/errata/RHSA-2025:22088 web
https://access.redhat.com/security/cve/CVE-2025-13467 web
https://bugzilla.redhat.com/show_bug.cgi?id=2416038 web
https://github.com/keycloak/keycloak package
https://github.com/keycloak/keycloak/releases/tag/26.4.6 web