CVE-2025-13467: Deserialization of Untrusted Data in Red Hat Red Hat build of Keycloak 26.2
CVE-2025-13467 is a medium severity vulnerability in Red Hat build of Keycloak 26.2 that allows an authenticated realm administrator to trigger deserialization of untrusted Java objects via a malicious LDAP server configuration. This flaw exists in the LDAP User Federation provider component. Exploitation requires high privileges (authenticated realm admin) and no user interaction. Red Hat has released updated Keycloak 26.2.11 images containing a fix for this issue. Users are advised to back up their installations and apply the update to mitigate the vulnerability.
AI Analysis
Technical Summary
The vulnerability CVE-2025-13467 affects the LDAP User Federation provider in Red Hat build of Keycloak 26.2. It allows an authenticated realm administrator to cause deserialization of untrusted Java objects by configuring a malicious LDAP server. This can lead to partial compromise of confidentiality and integrity, but not availability. The CVSS 3.1 base score is 5.5 (medium severity) with vector AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N. Red Hat has published security advisories RHSA-2025:22088 and RHSA-2025:22089 announcing new Keycloak 26.2.11 images that address this issue. The advisories recommend backing up existing installations before applying the update.
Potential Impact
Successful exploitation allows an authenticated realm administrator to trigger deserialization of untrusted data, potentially leading to partial loss of confidentiality and integrity within the Keycloak authentication environment. There is no impact on availability. The vulnerability requires high privileges and network access. No known exploits in the wild have been reported.
Mitigation Recommendations
Red Hat has released fixed versions of Keycloak 26.2.11 images that address this vulnerability. Users should back up their existing installations, including applications, configuration files, and databases, before applying the update. Applying the official update is the recommended remediation. No alternative mitigations or workarounds are specified in the vendor advisory.
CVE-2025-13467: Deserialization of Untrusted Data in Red Hat Red Hat build of Keycloak 26.2
Description
CVE-2025-13467 is a medium severity vulnerability in Red Hat build of Keycloak 26.2 that allows an authenticated realm administrator to trigger deserialization of untrusted Java objects via a malicious LDAP server configuration. This flaw exists in the LDAP User Federation provider component. Exploitation requires high privileges (authenticated realm admin) and no user interaction. Red Hat has released updated Keycloak 26.2.11 images containing a fix for this issue. Users are advised to back up their installations and apply the update to mitigate the vulnerability.
CVSS v3.1
Score 5.5medium
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2025-13467 affects the LDAP User Federation provider in Red Hat build of Keycloak 26.2. It allows an authenticated realm administrator to cause deserialization of untrusted Java objects by configuring a malicious LDAP server. This can lead to partial compromise of confidentiality and integrity, but not availability. The CVSS 3.1 base score is 5.5 (medium severity) with vector AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N. Red Hat has published security advisories RHSA-2025:22088 and RHSA-2025:22089 announcing new Keycloak 26.2.11 images that address this issue. The advisories recommend backing up existing installations before applying the update.
Potential Impact
Successful exploitation allows an authenticated realm administrator to trigger deserialization of untrusted data, potentially leading to partial loss of confidentiality and integrity within the Keycloak authentication environment. There is no impact on availability. The vulnerability requires high privileges and network access. No known exploits in the wild have been reported.
Mitigation Recommendations
Red Hat has released fixed versions of Keycloak 26.2.11 images that address this vulnerability. Users should back up their existing installations, including applications, configuration files, and databases, before applying the update. Applying the official update is the recommended remediation. No alternative mitigations or workarounds are specified in the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2025-11-20T03:12:40.336Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6925d6df159f97fbc0f9aed3
Added to database: 11/25/2025, 16:18:39 UTC
Last enriched: 05/28/2026, 21:24:38 UTC
Last updated: 09/10/2026, 19:36:49 UTC
Views: 607
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