# Duplicate Advisory: Keycloak LDAP User Federation provider enables admin-triggered untrusted Java deserialization

Source: https://junglewise.ai/threats/duplicate-advisory-keycloak-ldap-user-federation-provider-enables-admin-6ef538fe  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-11-25  
License: CC BY 4.0 with a link back

Severity: low · CVSS 3.1 · Published 2025-11-25

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

Technologies: [org.keycloak:keycloak-ldap-federation (Maven)](https://junglewise.ai/threats/technologies/org-keycloak-keycloak-ldap-federation). Vendors: [Maven](https://junglewise.ai/threats/vendors/maven).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Low severity, with a CVSS score of 3.1, published 25 November 2025.

**Which products and versions are affected?** org.keycloak:keycloak-ldap-federation (Maven) ECOSYSTEM:introduced=0,fixed=26.4.6.

**Is there a fix for This vulnerability?** Yes. org.keycloak:keycloak-ldap-federation (Maven): upgrade to 26.4.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected?** Check whether you run org.keycloak:keycloak-ldap-federation (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- org.keycloak:keycloak-ldap-federation (Maven): upgrade to 26.4.6 or later

  ```sh
  # set org.keycloak:keycloak-ldap-federation to 26.4.6 in your pom.xml or build.gradle
  ```


## Affected products

- org.keycloak:keycloak-ldap-federation (Maven) ECOSYSTEM:introduced=0,fixed=26.4.6

## Related threats

- [Keycloak denial of service via malformed LDAP password policy response](https://junglewise.ai/threats/cve-2026-9801-keycloak-denial-of-service-via-malformed-ldap-password-policy)
- [Keycloak LDAP User Federation provider enables admin-triggered untrusted Java deserialization](https://junglewise.ai/threats/cve-2025-13467-keycloak-ldap-user-federation-provider-enables-admin-triggered)
- [Authentication Bypass Due to Missing LDAP Bind After Password Reset in Keycloak](https://junglewise.ai/threats/cve-2025-0604-authentication-bypass-due-to-missing-ldap-bind-after-password)
- [Duplicate Advisory: Authentication Bypass Due to Missing LDAP Bind After Password Reset in Keycloak](https://junglewise.ai/threats/duplicate-advisory-authentication-bypass-due-to-missing-ldap-bind-after-f416d8ed)
- [Keycloak leaks configured LDAP bind credentials through the Keycloak admin console](https://junglewise.ai/threats/cve-2024-5967-keycloak-leaks-configured-ldap-bind-credentials-through-the)