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CVE Vulnerabilities

CVE-2025-13467

Deserialization of Untrusted Data

Published: Nov 25, 2025 | Modified: Nov 25, 2025
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
RedHat/V2
RedHat/V3
5.5 MODERATE
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
Ubuntu
Vulnerability-free packages from our partners
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2025-13467
CWEhttps://cwe.mitre.org/data/definitions/502.html

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.

Weakness

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected Software

Name Vendor Start Version End Version
Red Hat build of Keycloak 26.2 RedHat rhbk/keycloak-operator-bundle:26.2.11-1 *
Red Hat build of Keycloak 26.2 RedHat rhbk/keycloak-rhel9:26.2-12 *
Red Hat build of Keycloak 26.2 RedHat rhbk/keycloak-rhel9-operator:26.2-12 *
Red Hat build of Keycloak 26.2.11 RedHat keycloak *
Red Hat build of Keycloak 26.4 RedHat rhbk/keycloak-operator-bundle:26.4.6-1 *
Red Hat build of Keycloak 26.4 RedHat rhbk/keycloak-rhel9:26.4-6 *
Red Hat build of Keycloak 26.4 RedHat rhbk/keycloak-rhel9-operator:26.4-5 *
Red Hat build of Keycloak 26.4.6 RedHat keycloak *

Potential Mitigations

  • Make fields transient to protect them from deserialization.
  • An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.

References

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