How severe is CVE-2025-13467?

CVE-2025-13467 has a CVSS score of 5.5/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2025-13467?

CVE-2025-13467 affects the following packages: org.keycloak:keycloak-ldap-federation (Maven), org.keycloak:keycloak-ldap-federation (Maven). Ecosystems affected: Maven.

How do I fix CVE-2025-13467?

Update org.keycloak:keycloak-ldap-federation to 26.4.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-13467 is resolved across your whole dependency graph.

How do I detect CVE-2025-13467 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.keycloak:keycloak-ldap-federation, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2025-13467 if there is no patch (or I can't update yet)?

Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade.

Is CVE-2025-13467 actively exploited in the wild?

No public exploit code has been indexed for CVE-2025-13467 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2025-13467?

CVE-2025-13467 has an EPSS (Exploit Prediction Scoring System) score of 0.5%, placing it in the 41th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2025-13467?

CVE-2025-13467 is classified as Deserialization of Untrusted Data (CWE-502). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2025-13467 published, and has it been updated?

CVE-2025-13467 was published on November 25, 2025 and was last updated on October 28, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

MEDIUM severity

CVE-2025-13467 — keycloak-ldap-federation

MEDIUMFix: keycloak/keycloak@754c070

CVE-2025-13467 is a medium-severity (CVSS 5.5) Deserialization of Untrusted Data vulnerability in org.keycloak:keycloak-ldap-federation. A fix is available for org.keycloak:keycloak-ldap-federation — see the affected versions and patch details below.

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

Also known asGHSA-4hx9-48xh-5mxr

Published

Nov 25, 2025

Updated

Oct 28, 2026

Affected

2 pkgs

Patched

2 / 2

Exploits

None indexed

Exploitation data as of Nov 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-13467.

EPSS Exploitation Probability

via FIRST.org ↗

0.5%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs41th percentile — riskier than 41% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected

☕org.keycloak:keycloak-ldap-federation☕org.keycloak:keycloak-ldap-federation

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Mitigation

Disable LDAP referrals in all LDAP user providers in all realms if projects cannot upgrade to the patched versions.

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.keycloak:keycloak-ldap-federation`	≥ 26.3.0&&< 26.4.6	26.4.6`org.keycloak:keycloak-ldap-federation:26.4.6`
☕Maven	`org.keycloak:keycloak-ldap-federation`	all versions	26.2.11`org.keycloak:keycloak-ldap-federation:26.2.11`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.keycloak:keycloak-ldap-federation, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.keycloak:keycloak-ldap-federation to 26.4.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-13467 is resolved across your whole dependency graph.
Workarounds
Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

Workaround published by Red Hat

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Source: Red Hat security advisory for CVE-2025-13467 (CC BY 4.0)

Product	Fixed in	Advisory
Red Hat build of Keycloak 26.2	`rhbk/keycloak-operator-bundle:26.2.11-1`	RHSA-2025:22088
Red Hat build of Keycloak 26.2.11	`keycloak`	RHSA-2025:22089
Red Hat build of Keycloak 26.4	`rhbk/keycloak-operator-bundle:26.4.6-1`	RHSA-2025:22090
Red Hat build of Keycloak 26.4.6	`keycloak`	RHSA-2025:22091

Frequently Asked Questions

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.

O3 Security · Impact-Aware SCA

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