{"id":"UBUNTU-CVE-2023-5226","details":"An issue has been discovered in GitLab affecting all versions before 16.4.3, all versions starting from 16.5 before 16.5.3, all versions starting from 16.6 before 16.6.1. Under certain circumstances, a malicious actor bypass prohibited branch checks using a specially crafted branch name to manipulate repository content in the UI.","modified":"2025-10-24T05:01:36Z","published":"2023-12-01T07:15:00Z","upstream":["CVE-2023-5226"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-5226"},{"type":"REPORT","url":"https://gitlab.com/gitlab-org/gitlab/-/issues/426400"},{"type":"REPORT","url":"https://hackerone.com/reports/2173053"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2023-5226"}],"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/2023/UBUNTU-CVE-2023-5226.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}