CVE-2026-16255
highGitLab 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-…
Vendor / product: Gitlab — gitlab
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.
CVSS
7.1
7.1 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-10-22 01:16
Modified: 2026-11-04 23:10
NVD status: Analyzed
Last synced 39 minutes ago
Verified against the source API 2026-11-04 23:38 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
gitlab / gitlab ≥12.0.0 <19.3.6, ≥19.4.0 <19.4.3, 19.5.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/ cve@gitlab.com
- https://gitlab.com/gitlab-org/gitlab/-/work_items/606479 cve@gitlab.com
- https://hackerone.com/reports/3809350 cve@gitlab.com
Data sources
NVD CVE API 2.0 — fetched 2026-11-04 23:38 UTC · record ↗