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.
Package Versions Affected
Automatically patch vulnerabilities without upgrading
CVSS Version
Related Resources
References
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86543.json, https://github.com/knowns-dev/knowns/releases/tag/v0.30.0, https://github.com/knowns-dev/knowns/security/advisories/GHSA-fc85-99vc-9c75, https://nvd.nist.gov/vuln/detail/CVE-2026-86543, https://www.vulncheck.com/advisories/knowns-before-0.30.0-unauthenticated-management-api-exposure, https://github.com/knowns-dev/knowns/commit/878a02cb7cc14f0a592fdfda7a520af3cac500fb, https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/cli/browser.go#L193-L200, https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/server/auth.go#L80-L86, https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/server/routes/tunnel.go#L26-L38