p PatchFirst

CVE-2026-59723

CVE-2026-59723 · Cline: Cross-Origin WebSocket Hijacking in Cline Hub Dashboard (`/browser` endpoint)

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Cline is an autonomous coding agent as an SDK, IDE extension, or CLI assistant. Prior to 3.0.30, the Cline Hub dashboard server launched by the cline dashboard command accepts WebSocket connections on the /browser endpoint without validating the Origin header, and when ROOM_SECRET is unset for local 127.0.0.1 binds, isAuthorizedBrowserRequest() allows attacker-controlled websites to send desktopCommand frames that read workspace state, mutate MCP and provider settings, and trigger command execution when a provider or model is configured. This issue is fixed in version 3.0.30.

CVSS 8.8 · High · EPSS 0.2% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • cline

    Versions
    • < 3.0.30: Affected

    No fix published

  • cline npm

    Affected ranges
    • SEMVER: < 3.0.30

    Update to 3.0.30

Original sources

Check your server →