cockpit-356.4-1.el9_8.ML.1

Cockpit enables users to administer GNU/Linux servers using a web browser. It offers network configuration, log inspection, diagnostic reports, SELinux troubleshooting, interactive command-line sessions, and more.

Security Fix(es):

* cockpit: Cockpit: Denial of Service in `cockpit-ws` due to URL-root handling without a trailing slash (CVE-2026-91147)
* cockpit: Cockpit: Denial of Service via unbounded connection thread spawning (CVE-2026-91149)
* cockpit-ws: cockpit: cockpit-ws: unauthenticated remote memory leak via CockpitLang cookie in send_login_html (CVE-2026-76235)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

CVE-2026-76235
A memory leak flaw was found in cockpit-ws. The login page handler leaks a heap allocation on every unauthenticated request that carries a CockpitLang cookie, allowing a remote unauthenticated attacker to exhaust memory on the host and cause a denial of service.
CVE-2026-91147
A flaw was found in `cockpit-ws`. This vulnerability allows a remote, unauthenticated attacker to cause a Denial of Service (DoS) by sending a specially crafted request. When the `WebService.UrlRoot` is configured and a request is made to the exact URL-root prefix without a trailing slash, `cockpit-ws` can terminate unexpectedly. This issue leads to the unavailability of the Cockpit web service.
CVE-2026-91149
A flaw was found in Cockpit. An unauthenticated remote attacker can exploit this vulnerability by initiating and sustaining numerous simultaneous connections to the `cockpit-tls` service. This forces the service to create an unbounded number of detached threads, consuming system resources such as memory and file descriptors. The primary consequence is a denial of service (DoS), leading to degradation or complete unavailability of the Cockpit service for legitimate users.