GitLab released security updates for Community Edition and Enterprise Edition in versions 18.10.3, 18.9.5, and 18.8.9, patching multiple vulnerabilities that affect self-managed deployments and urging administrators to upgrade immediately. The fixes address high-severity issues including a websocket access control flaw, denial-of-service conditions, and unintended server-side command execution tied to vulnerabilities such as CVE-2026-5173, CVE-2026-1092, and CVE-2025-12664.
The release also resolves medium- and low-severity weaknesses involving code injection, cross-site scripting, GraphQL-related denial of service, CSV import and export handling, authorization bypasses, and information disclosure affecting private projects, protected environments, and custom roles. GitLab said some affected code paths date back to versions as old as 11.3 and 12.10, while GitLab.com and GitLab Dedicated are already protected; the company added that the patches require no new migrations and can be applied to multi-node deployments without downtime, although Omnibus packages still restart services during updates.

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2 events from the most recent confirmed update back to the earliest known activity.
GitLab stated that GitLab.com was already running the patched version and that GitLab Dedicated customers did not need to take action, indicating the fixes had already been deployed to hosted infrastructure. The company also noted the updates required no new migrations and should not require downtime for multi-node deployments.
On April 8, 2026, GitLab published patch releases 18.10.3, 18.9.5, and 18.8.9 for Community Edition and Enterprise Edition to fix multiple security vulnerabilities and bug fixes affecting self-managed deployments. GitLab urged all self-managed customers to upgrade immediately.
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