CVE-2026-86543
CVSS v3
9.8
CRITICAL
EPSS Score
0.9 %
exploit probability, as of 2026-09-28
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
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.
Technical details
- Published
- 2026-09-07
- Last Modified
- 2026-09-08
Frequently asked questions
What is 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.
Is CVE-2026-86543 actively exploited?
Active exploitation of CVE-2026-86543 has not been confirmed. Its EPSS score was 0.9% on 2026-09-28, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-86543?
CVE-2026-86543 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2026-86543 affecting your environment?
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