BIT-gitlab-2026-16255

    Dashboard / Vulnerabilities / BIT-gitlab-2026-16255

    BIT-gitlab-2026-16255

    Published: 29 Oct 2026Last Modified: 30 Oct 2026

    Summary: Incorrect Authorization in GitLab

    Details: 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.

    References: https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/, https://gitlab.com/gitlab-org/gitlab/-/work_items/606479, https://hackerone.com/reports/3809350, https://nvd.nist.gov/vuln/detail/CVE-2026-16255

    Affected packages

    Package

    Name: gitlab

    Purl: pkg:bitnami/gitlab

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 12.0.0
    Fixed -19.3.6

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    BIT-gitlab-2026-16255 | CVE-DB