GitLab has released important security updates for both Community Edition (CE) and Enterprise Edition (EE) to address two vulnerabilities affecting its GraphQL functionality. The flaws could allow attackers to manipulate publicly accessible projects or abuse request handling mechanisms in vulnerable self-managed GitLab deployments. Organizations running affected versions are advised to update immediately to the latest patched releases. The most severe vulnerability, CVE-2026-19478 (CVSS 9.4), affects GitLab's GraphQL directive processing. Due to improper handling of GraphQL requests, an unauthenticated attacker may be able to modify or delete content stored in public repositories under specific conditions. Successful exploitation could impact source code, documentation, CI/CD pipelines, infrastructure-as-code repositories, and other publicly available project assets, potentially disrupting software development and release workflows. GitLab also resolved CVE-2026-19650 (CVSS 7.1), a Cross-Site Request Forgery (CSRF) vulnerability in the GraphQL multiplex query handler. The flaw allows GraphQL mutation requests to be executed through specially crafted GET requests if an authenticated user is tricked into visiting a malicious page. While this attack requires user interaction, accounts with elevated privileges, such as project maintainers, group owners, or administrators, present attractive targets because successful exploitation could result in unauthorized changes within GitLab projects. The vulnerabilities affect multiple supported self-managed GitLab CE and EE branches, including Omnibus, source-based, Helm, and other deployment methods. GitLab.com and GitLab Dedicated have already been updated and are not affected.
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