CVE-2025-13467
MEDIUMCVE-2025-13467 is a medium-severity (CVSS 5.5) Deserialization of Untrusted Data vulnerability in org.keycloak:keycloak-ldap-federation. O3 Security confirms whether CVE-2025-13467 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Org.keycloak.storage.ldap: keycloak: deserialization of untrusted data in ldap user federation
Blast Radius
org.keycloak:keycloak-ldap-federation☕org.keycloak:keycloak-ldap-federationReal-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
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.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.keycloak:keycloak-ldap-federation | ≥ 26.3.0&&< 26.4.6 | 26.4.6 |
| ☕Maven | org.keycloak:keycloak-ldap-federation | all versions | 26.2.11 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.keycloak:keycloak-ldap-federation. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
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
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether CVE-2025-13467 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to CVE-2025-13467. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2025-13467 in your dependencies?
O3 detects CVE-2025-13467 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.