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    CVE-2026-3254

    GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.11 before 18.11.1 that under certain conditions could have allowed an authenticated user to load unauthorized content into another user's browser due to improper input validation in the Mermaid sandbox.

    Published:Apr 22, 2026
    Last Modified:Apr 23, 2026
    EPS:Apr 22, 2026
    EPSS Score:0.00011
    CVSS Score:3.5

    Affected Products

    Vendor
    Gitlab
    Product
    Gitlab

    Exploits

    No exploit reference

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    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