CVE-2025-13467: Keycloak ldap federation Keycloak LDAP User Federation Provider Vulnerability
MODERATECVE-2025-13467 is a MODERATE (CVSS 5.5) keycloak ldap user federation provider vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Keycloak ldap federation libraries in the Maven ecosystem. The issue involves keycloak ldap user federation provider enables admin-triggered untrusted java deserialization. Remediation is available by upgrading affected packages to version 26.4.6, 26.2.11.
CVE-2025-13467 at a Glance
Security Impact
CVSS: 5.5
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N).
How to Fix CVE-2025-13467
To remediate this vulnerability, upgrade all affected Keycloak ldap federation dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
<dependency>
<groupId>org.keycloak</groupId>
<artifactId>keycloak-ldap-federation</artifactId>
<version>26.4.6</version>
</dependency><dependency>
<groupId>org.keycloak</groupId>
<artifactId>keycloak-ldap-federation</artifactId>
<version>26.2.11</version>
</dependency>Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:tree -Dincludes=org.keycloakHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2025-13467, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:tree -Dincludes=org.keycloakAnalyze the terminal output to locate any version of Keycloak ldap federation in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 26.4.6), your application is affected.
Note: The mvn dependency:tree -Dincludes=org.keycloak command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Keycloak ldap federation, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2025-13467 Affected Keycloak ldap federation Versions
2 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
org.keycloak:keycloak-ldap-federation
|
Maven |
≥ 26.3.0
< 26.4.6
|
26.4.6
|
|
org.keycloak:keycloak-ldap-federation
|
Maven |
< 26.2.11
|
26.2.11
|
References
Frequently Asked Questions
What is CVE-2025-13467?
Which Keycloak ldap federation versions are affected?
What version fixes CVE-2025-13467?
Is keycloak-ldap-federation affected?
What is the CVSS score of CVE-2025-13467?
What CWE is associated with CVE-2025-13467?
How can I check Maven dependencies for CVE-2025-13467?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-4hx9-48xh-5mxr",
"modified" : "2026-02-17T17:48:45Z",
"published" : "2025-12-19T21:31:05Z",
"aliases" : [ "CVE-2025-13467" ],
"summary" : "Keycloak LDAP User Federation provider enables admin-triggered untrusted Java deserialization",
"details" : "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.\n\n### Mitigation\n\nDisable LDAP referrals in all LDAP user providers in all realms if projects cannot upgrade to the patched versions.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "org.keycloak:keycloak-ldap-federation"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "26.3.0"
}, {
"fixed" : "26.4.6"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Maven",
"name" : "org.keycloak:keycloak-ldap-federation"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "26.2.11"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/keycloak/keycloak/security/advisories/GHSA-4hx9-48xh-5mxr"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-13467"
}, {
"type" : "WEB",
"url" : "https://github.com/keycloak/keycloak/issues/44478"
}, {
"type" : "WEB",
"url" : "https://github.com/keycloak/keycloak/commit/754c070cf8ca187dcc71f0f72ff3130ff2195328"
}, {
"type" : "WEB",
"url" : "https://github.com/keycloak/keycloak/commit/b90fec41ff17a70858d830750156a8a2e13ddb82"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2025:22088"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/security/cve/CVE-2025-13467"
}, {
"type" : "WEB",
"url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2416038"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/keycloak/keycloak"
}, {
"type" : "WEB",
"url" : "https://github.com/keycloak/keycloak/releases/tag/26.4.6"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-502" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2025-12-19T21:31:05Z",
"nvd_published_at" : null
}
}