{"id":"UBUNTU-CVE-2026-5173","details":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9.6 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user to invoke unintended server-side methods through websocket connections due to improper access control.","modified":"2026-04-16T09:12:29Z","published":"2026-04-08T23:17:00Z","upstream":["CVE-2026-5173"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-5173"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-5173"},{"type":"REPORT","url":"https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/"},{"type":"REPORT","url":"https://gitlab.com/gitlab-org/gitlab/-/work_items/588959"}],"affected":[{"package":{"name":"gitlab","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/gitlab@8.5.8+dfsg-5?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.4.3+dfsg-9","8.4.3+dfsg-12","8.5.8+dfsg-5"],"ecosystem_specific":{"binaries":[{"binary_name":"gitlab","binary_version":"8.5.8+dfsg-5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5173.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}