GHSA-93vm-mqpw-8wh3: Duplicate Advisory Keycloak LDAP User Federation Provider Vulnerability

MODERATE
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CVSS 5.5
CWE-502
Published
Advisory Summary

GHSA-93vm-mqpw-8wh3 is a MODERATE (CVSS 5.5) keycloak ldap user federation provider vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Duplicate Advisory 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.

GHSA-93vm-mqpw-8wh3 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-93vm-mqpw-8wh3
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Duplicate Advisory
Package Ecosystem Maven
Published Date
Last Updated

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).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required High (PR:H)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix GHSA-93vm-mqpw-8wh3

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.keycloak:keycloak-ldap-federation fixed: 26.4.6 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-ldap-federation</artifactId>
    <version>26.4.6</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.keycloak

How to Check if You Are Affected

To determine whether your Java application is affected by GHSA-93vm-mqpw-8wh3, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.keycloak

Analyze the terminal output to locate any version of Duplicate Advisory 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 Duplicate Advisory, 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

### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-4hx9-48xh-5mxr. This link is maintained to preserve external references. ### Original Description 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.

GHSA-93vm-mqpw-8wh3 Affected Duplicate Advisory Versions

1 component(s)
Fixed Versions:
26.4.6
Product / Package Ecosystem Affected Versions Fixed Version
org.keycloak:keycloak-ldap-federation
maven/org.keycloak/keycloak-ldap-federation
Maven
< 26.4.6
26.4.6

References

NVD — GHSA-93vm-mqpw-8wh3 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-13467
Duplicate Advisory Source Repository REPOSITORY
https://github.com/keycloak/keycloak/issues/44478
Security Fix Commit FIX COMMIT
https://github.com/keycloak/keycloak/commit/754c070cf8ca187dcc71f0f72ff3130ff2195328
access.redhat.com/errata/rhsa-2025:22... WEB
https://access.redhat.com/errata/RHSA-2025:22088
access.redhat.com/errata/rhsa-2025:22... WEB
https://access.redhat.com/errata/RHSA-2025:22089
access.redhat.com/errata/rhsa-2025:22... WEB
https://access.redhat.com/errata/RHSA-2025:22090
access.redhat.com/errata/rhsa-2025:22... WEB
https://access.redhat.com/errata/RHSA-2025:22091
Duplicate Advisory Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2025-13467
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2416038
Duplicate Advisory Source Repository REPOSITORY
https://github.com/keycloak/keycloak
Duplicate Advisory Release RELEASE
https://github.com/keycloak/keycloak/releases/tag/26.4.6

Frequently Asked Questions

What is GHSA-93vm-mqpw-8wh3?
GHSA-93vm-mqpw-8wh3 is a security vulnerability in Duplicate Advisory involving Keycloak LDAP User Federation provider enables admin-triggered untrusted Java deserialization under CWE-502: Deserialization of Untrusted Data.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to 26.4.6 across affected packages: org.keycloak:keycloak-ldap-federation.
What version fixes GHSA-93vm-mqpw-8wh3?
Upgrading to 26.4.6 (or the latest patched release for your respective branch) resolves the vulnerability.
Is keycloak-ldap-federation affected?
Yes, org.keycloak:keycloak-ldap-federation is affected in releases prior to 26.4.6. Upgrade your dependency to 26.4.6 or later.
What is the CVSS score of GHSA-93vm-mqpw-8wh3?
GHSA-93vm-mqpw-8wh3 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N.
What CWE is associated with GHSA-93vm-mqpw-8wh3?
GHSA-93vm-mqpw-8wh3 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check Maven dependencies for GHSA-93vm-mqpw-8wh3?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.keycloak'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-93vm-mqpw-8wh3",
  "modified" : "2025-12-23T21:30:23Z",
  "published" : "2025-11-25T18:32:22Z",
  "withdrawn" : "2025-12-19T21:27:08Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Keycloak LDAP User Federation provider enables admin-triggered untrusted Java deserialization",
  "details" : "### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-4hx9-48xh-5mxr. This link is maintained to preserve external references.\n\n### Original Description\n\nA 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.",
  "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" : "0"
      }, {
        "fixed" : "26.4.6"
      } ]
    } ]
  } ],
  "references" : [ {
    "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://access.redhat.com/errata/RHSA-2025:22088"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2025:22089"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2025:22090"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2025:22091"
  }, {
    "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" : "2025-11-26T22:01:36Z",
    "nvd_published_at" : "2025-11-25T16:16:06Z"
  }
}