Deserialization of Untrusted Data in Keycloak - CVE-2025-13467
Published: November 27, 2025 / Updated: December 19, 2025
Vulnerability identifier: #VU118800
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-13467
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to compromise the affected system.
The vulnerability exists due to insecure input validation when processing serialized data in the Keycloak LDAP User Federation provider. A remote privileged user can create a malicious LDAP server configuration and execute arbitrary code on the target system.
Affected software
Keycloak
Red Hat build of Keycloak
Red Hat build of Keycloak
How to mitigate CVE-2025-13467
Install updates from vendor's website.
Keycloak - addressed in versions 26.2.11, 26.4.6
Red Hat build of Keycloak - addressed in versions 26.2.11, 26.4.6
Red Hat build of Keycloak - addressed in versions 26.2.11, 26.4.6