CVE-2020-26409

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    CVE-2020-26409

    Published: 11 Dec 2020Last Modified: 27 Aug 2026

    Summary:

    Details: A DOS vulnerability exists in Gitlab CE/EE >=10.3, <13.4.7,>=13.5, <13.5.5,>=13.6, <13.6.2 that allows an attacker to trigger uncontrolled resource by bypassing input validation in markdown fields.

    References: https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26409.json, https://gitlab.com/gitlab-org/gitlab/-/issues/259626, https://hackerone.com/reports/990461

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 6369db0196ec7b6e288b16382c95243424a59b62
    Fixed -f23895b2190f1d72d96ada15463ab8e20abead5b

    Affected versions

    v13.6.1-ee
    v13.6.0-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-2020-26409 | CVE-DB