CVE-2025-13467
Org.keycloak.storage.ldap: keycloak: deserialization of untrusted data in ldap user federation
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Org.keycloak.storage.ldap: keycloak: deserialization of untrusted data in ldap user federation
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.
- Record
CVE-2025-13467- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N - Weakness
- CWE-502
- Updated
- 2026-11-02
EUVDEUVD-2025-199598
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.
- Record
EUVD-2025-199598- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-4hx9-48xh-5mxr
Keycloak LDAP User Federation provider enables admin-triggered untrusted Java deserialization
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.
Mitigation
Disable LDAP referrals in all LDAP user providers in all realms if projects cannot upgrade to the patched versions.
- Record
GHSA-4hx9-48xh-5mxr- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N - Weakness
- CWE-502
- Updated
- 2026-11-02
GitHub AdvisoriesGHSA-93vm-mqpw-8wh3
Duplicate Advisory: Keycloak LDAP User Federation provider enables admin-triggered untrusted Java deserialization
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This advisory has been withdrawn because it is a duplicate of GHSA-4hx9-48xh-5mxr.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.
- Record
GHSA-93vm-mqpw-8wh3- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N - Weakness
- CWE-502
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2025-13467- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N - Weakness
- CWE-502
- Updated
- 2026-11-02
OSV
Org.keycloak.storage.ldap: keycloak: deserialization of untrusted data in ldap user federation
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.
- Record
CVE-2025-13467- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N - Weakness
- CWE-502
- Updated
- 2026-11-02
OSVGHSA-4hx9-48xh-5mxr
Keycloak LDAP User Federation provider enables admin-triggered untrusted Java deserialization
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.
Mitigation
Disable LDAP referrals in all LDAP user providers in all realms if projects cannot upgrade to the patched versions.
- Record
GHSA-4hx9-48xh-5mxr- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N - Weakness
- CWE-502
- Updated
- 2026-11-02
OSVGHSA-93vm-mqpw-8wh3
Duplicate Advisory: Keycloak LDAP User Federation provider enables admin-triggered untrusted Java deserialization
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.
- Record
GHSA-93vm-mqpw-8wh3- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N - Weakness
- CWE-502
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.keycloak:keycloak-ldap-federationMaven |
26.3.0 up to 26.4.6 | 26.4.6 |
org.keycloak:keycloak-ldap-federationMaven |
before 26.2.11 | 26.2.11 |
org.keycloak:keycloak-ldap-federationMaven |
26.3.0 up to 26.4.6, plus listed versions 26.3.126.3.226.3.326.3.426.3.5 Show 6 moreShow less26.4.026.4.126.4.226.4.326.4.426.4.5 |
26.4.6 |
org.keycloak:keycloak-ldap-federationMaven |
before 26.2.11, plus listed versions 1.0-beta-41.0-final1.0-rc-11.0-rc-21.0.1.Final Show 45 moreShow less1.0.2.Final1.0.3.Final1.0.4.Final1.0.5.Final1.1.0.Beta11.1.0.Beta21.1.0.Final1.1.1.Final1.2.0.Beta11.2.0.CR11.2.0.Final1.3.0.Final1.3.1.Final1.4.0.Final1.5.0-Final1.5.0.Final1.5.1.Final1.6.0.Final1.6.1.Final1.7.0.CR11.7.0.Final1.8.0.Alpha11.8.0.CR11.8.0.CR21.8.0.CR31.8.0.Final1.8.1.Final1.9.0.CR11.9.0.Final1.9.1.Final1.9.2.Final1.9.3.Final1.9.4.Final1.9.5.Final1.9.7.Final1.9.8.Final10.0.010.0.110.0.211.0.011.0.111.0.211.0.312.0.012.0.1 |
26.2.11 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-13467 is a medium vulnerability (CVSS 5.5) in Keycloak, published November 25, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.47%, the 41st percentile. Fixed in org.keycloak:keycloak-ldap-federation 26.4.6.
References
access.redhat.com/errata/RHSA-2025:22088
bugzilla.redhat.com/show_bug.cgi?id=2416038
Show 12 moreShow less
github.com/keycloak/keycloak/commit/754c070cf8ca187dcc71f0f72ff3130ff2195328
nvd.nist.gov/vuln/detail/CVE-2025-13467
catalog.redhat.com/software/containers
Left out here: 142 versions. The JSON record has them.