CVE-2026-86543

knowns versions before 0.30.0 serve the management API without authentication on all network interfaces by default, with no password required on fresh installations. Attackers can access the unauthenticated /api/tunnel/start endpoint to provision a public tunnel and republish the API at a publicly accessible address.

  • Published Sep 7, 2026
  • CVSS 9.3 critical
  • 0.9% chance of exploitation in the next 30 days (EPSS)
  • A fix is available

Affected software

CVE-2026-86543 at the National Vulnerability Database