CVE-2023-3994

    Dashboard / Vulnerabilities / CVE-2023-3994

    CVE-2023-3994

    Published: 2 Aug 2023Last Modified: 11 Sept 2026

    Summary: Inefficient Regular Expression Complexity in GitLab

    Details: An issue has been discovered in GitLab CE/EE affecting all versions starting from 9.3 before 16.0.8, all versions starting from 16.1 before 16.1.3, all versions starting from 16.2 before 16.2.2. A Regular Expression Denial of Service was possible via sending crafted payloads which use ProjectReferenceFilter to the preview_markdown endpoint.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3994.json, https://nvd.nist.gov/vuln/detail/CVE-2023-3994, https://gitlab.com/gitlab-org/gitlab/-/issues/416225, https://hackerone.com/reports/1963255, git://[email protected]:gitlab-org/gitlab.git

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 53f18d8326e26304f6df0996c615ca72b6a85e5b
    Fixed -b989ef135498a860c86648c76637bb14442da7c5

    Affected versions

    v16.2.1-ee
    v16.2.0-ee

    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-2023-3994 | CVE-DB