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    CVE-2026-12856

    A flaw was found in the vscode-java extension, which provides Java language support for Visual Studio Code. The extension incorrectly trusts all Markdown content in JavaDoc hovers, allowing a malicious Java file to include hidden commands. If a user clicks a specially crafted link within a JavaDoc hover popup, an attacker can execute arbitrary VS Code commands, which can lead to full system compromise in trusted workspaces.

    Published:Jun 29, 2026
    Last Modified:Jul 8, 2026
    EPS:Jun 29, 2026
    EPSS Score:0.00292
    CVSS Score:8.8

    Affected Products

    Vendor
    Redhat
    Product
    Openshift Dev Spaces
    Vendor
    Redhat
    Product
    Openshift Devspaces

    Exploits

    No exploit reference

    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