CVEvulnerability
CVE-2026-86543
9.3 CRITICAL
Official page ↗
- Status
- Deferred
- Published
- 2026-09-07
- Last modified
- 2026-09-14
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 9.3 CRITICAL — CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-306
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.
Related
Weakness · CWE (1)
- CWE-306 Missing Authentication for Critical Functionality weakness
References
- https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/cli/browser.go#L193-L200 github.com
- https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/server/auth.go#L80-L86 github.com
- https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/server/routes/tunnel.go#L26-L38 github.com
- https://github.com/knowns-dev/knowns/commit/878a02cb7cc14f0a592fdfda7a520af3cac500fb github.com
- https://github.com/knowns-dev/knowns/releases/tag/v0.30.0 github.com
- https://github.com/knowns-dev/knowns/security/advisories/GHSA-fc85-99vc-9c75 github.com
- https://www.vulncheck.com/advisories/knowns-before-0.30.0-unauthenticated-management-api-exposure www.vulncheck.com