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.
References7
- github.com/knowns-dev/knowns/blob/v0.29.1/internal/cli/browser.…
- github.com/knowns-dev/knowns/blob/v0.29.1/internal/server/auth.…
- github.com/knowns-dev/knowns/blob/v0.29.1/internal/server/route…
- github.com/knowns-dev/knowns/commit/878a02cb7cc14f0a592fdfda7a5…
- github.com/knowns-dev/knowns/releases/tag/v0.30.0
- github.com/knowns-dev/knowns/security/advisories/GHSA-fc85-99vc…
- www.vulncheck.com/advisories/knowns-before-0.30.0-unauthenticat…
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 4.0
-
9.3
CRITICAL
Score source: CNA
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 - EPSS — exploit probability
- 1% percentile: 58 · as of 3 November 2026
- CWE
- CWE-306
Could this be exploited in your environment?
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