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Fencer Vulns
medium 5.5

CVE-2025-13467 json

Org.keycloak.storage.ldap: keycloak: deserialization of untrusted data in ldap user federation

published 2025-11-25 11 mo ago modified 2026-10-18 21 d ago also GHSA-4hx9-48xh-5mxr , EUVD-2025-199598

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits
0
none known

Summary

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.

Patch / fix

  • maven org.keycloak:keycloak-ldap-federation 26.2.11, 26.4.6
  • Keycloak Keycloak 26.4.6
  • Red Hat Red Hat build of Keycloak 26.2 26.2-12, 26.2.11-1
  • Red Hat Red Hat build of Keycloak 26.4 26.4-5, 26.4-6, 26.4.6-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-13467 updated cvss 5.5

org.keycloak.storage.ldap: Keycloak: Deserialization of Untrusted Data in LDAP User Federation

  • Red Hat build of Keycloak 26.2 rhbk/keycloak-rhel9 26.2-12, rhbk/keycloak-rhel9-operator 26.2-12, rhbk/keycloak-operator-bundle 26.2.11-1
    fixed: vendor fix RHSA-2025:22088
  • Red Hat build of Keycloak 26.2.11
    fixed: vendor fix RHSA-2025:22089
  • Red Hat build of Keycloak 26.4 rhbk/keycloak-rhel9 26.4-6, rhbk/keycloak-rhel9-operator 26.4-5, rhbk/keycloak-operator-bundle 26.4.6-1
    fixed: vendor fix RHSA-2025:22090
  • Red Hat build of Keycloak 26.4.6
    fixed: vendor fix RHSA-2025:22091

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
11 mo ago

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.5 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
GitHub 3.1 5.5 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
maven org.keycloak:keycloak-ldap-federation
>=26.3.0, <26.4.6
<26.2.11
26.4.6
26.2.11

Affected products

  • Keycloak Keycloak
  • Red Hat Red Hat build of Keycloak 26.2
  • Red Hat Red Hat build of Keycloak 26.2.11
  • Red Hat Red Hat build of Keycloak 26.4
  • Red Hat Red Hat build of Keycloak 26.4.6

Classification

Weakness
  • CWE-502 Deserialization of Untrusted Data

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.