CVE-2025-11429 Keycloak-server: too long and not settings compliant session

What is CVE-2025-11429?

CVE-2025-11429 is a medium-severity vulnerability in Red Hat build of Keycloak 26.2, published on 23 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A flaw was found in Keycloak. Keycloak does not immediately enforce the disabling of the "Remember Me" realm setting on existing user sessions. Sessions created while "Remember Me" was active retain their extended session lifetime until they expire, overriding the administrator's recent security configuration change. This is a logic flaw in session management increases the potential window for successful session hijacking or unauthorized long-term access persistence. The flaw lies in the session expiration logic relying on the session-local "remember-me" flag without validating the current realm-level configuration.

Weakness: CWE-613

Which versions are affected by CVE-2025-11429?

4 open source packages ship an affected version, including org.keycloak:keycloak-services.

How do I fix CVE-2025-11429?

Upgrade org.keycloak:keycloak-services to a fixed version for your release line: 26.2.11 or 26.4.1.

Is CVE-2025-11429 being exploited?

There is no known exploitation of CVE-2025-11429 in the wild and no public exploit code.

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ECHO-0db4-a794-6040, GHSA-64w3-5q9m-68xf, MINI-wm6g-3x62-qr8m.