GitLab Patches Critical 9.9 AI Gateway Flaw Allowing Command Execution on Self-Hosted Servers

GitLab Patches Critical 9.9 AI Gateway Flaw Allowing Command Execution on Self-Hosted Servers Swati KhandelwalOct 02, 2026Vulnerability / Application Security A critical flaw in GitLab's AI Gateway could let a logged-in user with Duo Agent Platform access run commands on the gateway under certain conditions, GitLab said in an advisory. The gateway is the service that connects a GitLab instance to AI models, and only organizations that host their own gateway need to act. The flaw is fixed in gateway versions 19.2.4, 19.3.2, and 19.4.1. The flaw is tracked as CVE-2026-90970. GitLab disclosed it on October 2 and rated it critical, with a CVSS score of 9.9 out of 10. GitLab runs AI Gateways for its customers and has already…