In Keycloak version 21.0.2 a medium severity vulnerability CVE-2024-11734 was detected. This vulnerability allows attackers to disrupt the Keycloak service by modifying security headers, causing requests to fail and the service to become unavailable. To fix this issue, users should upgrade Keycloak to version 26.0.8. For more details, visit https://nvd.nist.gov/vuln/detail/cve-2024-11734.