GitLab patches critical GraphQL flaw allowing unauthenticated project deletion
GitLab released an emergency security update on Aug 17 to address a critical GraphQL vulnerability that could let unauthenticated attackers modify or delete public projects without any user action.
Source: The Hacker News · August 18, 2026 at 8:01 AM · AI-assisted report
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KUALA LUMPUR, 18 AUGUST 2026 —
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GitLab released an emergency security update on Aug 17 to address a critical GraphQL vulnerability that could let unauthenticated attackers modify or delete public projects without any user action.
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The flaw, tracked as CVE-2026-19478 and rated Critical with a CVSS score of 9.4, affects self-managed installations running versions 18.11 through 19.2. Patches are available in GitLab 19.2.4, 19.1.6, 19.0.8 and 18.11.11, according to the company. GitLab.com and GitLab Dedicated already run the fixed code and require no action.
A second flaw, CVE-2026-19650 rated High at CVSS 7.1, was also fixed; it requires user interaction to exploit via a CSRF vector in GraphQL multiplex query handling, GitLab said. Neither flaw has seen public exploitation or exploit code as of Aug 18.
Full technical details will be published on Nov 16, 30 days after the June 10 patch release that shortened GitLab’s disclosure window from 90 to 30 days. GitLab said the update introduces no new migrations and should not require downtime on multi-node deployments.