{"id":"CVE-2026-16255","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-16255","generatedAt":"2026-10-28T00:52:14.298Z","title":"GitLab has remediated an issue in GitLab EE affecting all versions from 12.0 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, when the instance-wide SAML or LDAP membership lock was enabled, an authenticated user could have granted or…","description":"GitLab has remediated an issue in GitLab EE affecting all versions from 12.0 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, when the instance-wide SAML or LDAP membership lock was enabled, an authenticated user could have granted or accepted project and group membership outside the identity provider's control, due to incomplete enforcement of the membership lock on requests created before the lock was enabled.","published":"2026-10-22T01:17:00.000Z","lastModified":"2026-10-22T16:18:19.000Z","status":"Awaiting Analysis","sourceIdentifier":"cve@gitlab.com","cvss":{"version":"3.1","score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N"},"cwe":["CWE-863"],"affected":[],"epss":{"score":0.00209,"percentile":0.10962,"date":"2026-10-26","history":[{"date":"2026-10-22","score":0.00209,"percentile":0.10507}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.21%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-22T01:17:00.000Z","detail":{"score":"5.9","severity":"MEDIUM","publishedAt":"2026-10-22T01:16:59.613Z"},"summary":"New CVE, medium severity (CVSS 5.9)."}],"references":[{"url":"https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/","source":"cve@gitlab.com"},{"url":"https://gitlab.com/gitlab-org/gitlab/-/work_items/606479","source":"cve@gitlab.com"},{"url":"https://hackerone.com/reports/3809350","source":"cve@gitlab.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-16255","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}