What’s Vulnerable › Vulnerabilities

CVE-2025-10939: Org.keycloak/keycloak-quarkus-server: unable to restrict access to the admin console

• Severity: low (CVSS 3.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-28 · updated 2026-10-18
• Weakness: CWE-427

Description

A flaw was found in Keycloak. The Keycloak guides recommend to not expose /admin path to the outside in case the installation is using a proxy. The issue occurs at least via ha-proxy, as it can be tricked to using relative/non-normalized paths to access the /admin application path relative to /realms which is expected to be exposed.

Affected products

• Red Hat build of Keycloak 26.4: all versions — fixed in 26.4-3, 26.4.4-1
• Keycloak: before 26.4.4 — fixed in 26.4.4

How to fix

Upgrade to a fixed version: Red Hat build of Keycloak 26.4 26.4-3, 26.4.4-1; Keycloak 26.4.4. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2025:21370
• https://access.redhat.com/errata/RHSA-2025:21371
• https://access.redhat.com/security/cve/CVE-2025-10939
• https://bugzilla.redhat.com/show_bug.cgi?id=2398025
• https://github.com/keycloak/keycloak/issues/43763
• https://github.com/keycloak/keycloak/pull/43765

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