Critical severity9.8NVD Advisory· Published Sep 7, 2026
CVE-2026-86543
CVE-2026-86543
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.
Affected products
1- Range: <0.30.0
Patches
Vulnerability mechanics
References
7- github.com/knowns-dev/knowns/blob/v0.29.1/internal/cli/browser.gonvd
- github.com/knowns-dev/knowns/blob/v0.29.1/internal/server/auth.gonvd
- github.com/knowns-dev/knowns/blob/v0.29.1/internal/server/routes/tunnel.gonvd
- github.com/knowns-dev/knowns/commit/878a02cb7cc14f0a592fdfda7a520af3cac500fbnvd
- github.com/knowns-dev/knowns/releases/tag/v0.30.0nvd
- github.com/knowns-dev/knowns/security/advisories/GHSA-fc85-99vc-9c75nvd
- www.vulncheck.com/advisories/knowns-before-0.30.0-unauthenticated-management-api-exposurenvd
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