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OpenAdvisories

Product · Microsoft

simplechat

4 known vulnerabilities.

All Critical High Medium Low Exploited only Public exploit

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  • High 8.7
    CVE-2026-105798

    SimpleChat: Stored XSS via group document filename in inline onclick handler

    SimpleChat is a secure AI conversation application with personal and group workspaces for document-grounded interactions. Prior to 0.261.029, POST /api/group_documents/upload stores an attacker-controlled group document filename that group_workspaces.html lat…

    Microsoft simplechat
  • High 8.8
    CVE-2026-105797

    SimpleChat: Command injection via authorization-gate ordering flaw (arbitrary process spawn through MCP stdio transport)

    SimpleChat is a secure AI conversation application with personal and group workspaces for document-grounded interactions. In versions 0.261.003 and 0.261.027, an authorization ordering flaw in POST /api/user/plugins allows an authenticated low-privileged user…

    Microsoft simplechat
  • High 8.6
    CVE-2026-57206

    SimpleChat plugin validation endpoints missing authentication and authorization

    SimpleChat is a secure AI conversation application with personal and group workspaces for document-grounded interactions. Prior to 0.241.206, several plugin validation routes in application/single_app/plugin_validation_endpoint.py, including `POST /api/admin/…

    Microsoft simplechat