CVE-2023-3909

    Dashboard / Vulnerabilities / CVE-2023-3909

    CVE-2023-3909

    Published: 6 Nov 2023Last Modified: 30 Oct 2026

    Summary: Inefficient Regular Expression Complexity in GitLab

    Details: An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.3 before 16.3.6, all versions starting from 16.4 before 16.4.2, all versions starting from 16.5 before 16.5.1. A Regular Expression Denial of Service was possible by adding a large string in timeout input in gitlab-ci.yml file.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3909.json, https://nvd.nist.gov/vuln/detail/CVE-2023-3909, https://gitlab.com/gitlab-org/gitlab/-/issues/418763, https://hackerone.com/reports/2050269, git://[email protected]:gitlab-org/gitlab.git

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- c5ab21eda575676ffc46b85cab3456473c0357c6
    Fixed -128862473d18a7df991090bb25688a8c81fcb0fe

    Affected versions

    16.5.0

    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
    CVE-2023-3909 | CVE-DB