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[ CVE-2026-16255 · Published 22 Oct 2026 ]

Vulnerability in GitLab

CVSS 5.9 EPSS <1%3 agency advisoriesNo fix listed yet

[ Description ]Official 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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

  • NCSC-NLNCSC-2026-0447

    Vulnerabilities fixed in GitLab by GitLab Inc. Translated from Dutch

    Probability/damage M/HCVE-2026-12664CVE-2026-13319CVE-2026-14288+9 more CVEs
  • CERT-FRCERTFR-2026-AVI-1363

    Multiple vulnerabilities in GitLab Translated from French

    Multiple vulnerabilities have been discovered in GitLab. Some of them allow an attacker to cause remote arbitrary code execution, a breach of data confidentiality and a security policy bypass.

    CVE-2026-12664CVE-2026-112378CVE-2026-15723+9 more CVEs
  • BSI CERT-BundWID-SEC-2026-4115

    GitLab: Multiple vulnerabilities Translated from German

    Risk highCVE-2026-13319CVE-2026-110264CVE-2026-112378+9 more CVEs

[ References ]References