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Fedora 43 Cockpit CVE-2026

Linuxsecurity •LinuxSecurity Advisories • September 4, 2026

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The Cockpit Web Console enables users to administer GNU/Linux servers using a

It offers network configuration, log inspection, diagnostic reports, SELinux

troubleshooting, interactive command-line sessions, and more.

Automatic update for cockpit-367-1.fc43. Changelog for cockpit * Thu Aug 27 2026 Packit - 367-1 - Translation updates

* Thu Aug 27 2026 Packit - 367-1 - Translation updates

[ 1 ] Bug #2519502 - CVE-2026-76235 cockpit: cockpit-ws: unauthenticated remote memory leak via CockpitLang cookie in send_login_html [fedora-all]

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-edff423bf7' at the command line. For more information, refer to the dnf documentation available at

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The full story

This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Critical Memory Leak Vulnerability in Fedora Cockpit A significant memory leak vulnerability, identified as CVE-2026-76235, affects the Cockpit Web Console in Fedora systems. This flaw allows unauthenticated remote users to exploit the CockpitLang cookie, potentially leading to unauthorized access to sensitive information. The vulnerability was published on August 19, 2026, and impacts both Fedora 43 and 44 versions. Users are urged to apply the latest updates to mitigate the risk. The flaw affects all Fedora installations utilizing the Cockpit Web Console. The latest updates for Fedora 44 and 43 were released on September 2 and September 4, respectively, to address this issue. Administrators can install the updates using the 'dnf' package manager. The situation remains critical as the vulnerability could be exploited if not patched promptly. 2 sources 58

Extracted Entities

CVEs (1)

CVE-2026-76235

Platforms (1)

Linux