CVE-2026-86543
Published:September 07, 2026
Updated:September 22, 2026
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.
Affected Packages
https://github.com/knowns-dev/knowns.git (GITHUB):
Affected version(s) >=v0.23.0 <v0.30.0Fix Suggestion:
Update to version v0.30.0knowns (NPM):
Affected version(s) >=0.23.0 <0.30.0Fix Suggestion:
Update to version 0.30.0Related Resources (9)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Missing Authentication for Critical Function
EPSS
Base Score:
0.44