{"id":"CVE-2026-86543","summary":"knowns before 0.30.0 Unauthenticated Management API Exposure","details":"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.","aliases":["GHSA-fc85-99vc-9c75"],"modified":"2026-09-10T03:30:26.313736136Z","published":"2026-09-07T23:03:20.773Z","database_specific":{"cwe_ids":["CWE-306"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86543.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86543.json"},{"type":"ADVISORY","url":"https://github.com/knowns-dev/knowns/releases/tag/v0.30.0"},{"type":"ADVISORY","url":"https://github.com/knowns-dev/knowns/security/advisories/GHSA-fc85-99vc-9c75"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86543"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/knowns-before-0.30.0-unauthenticated-management-api-exposure"},{"type":"FIX","url":"https://github.com/knowns-dev/knowns/commit/878a02cb7cc14f0a592fdfda7a520af3cac500fb"},{"type":"ARTICLE","url":"https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/cli/browser.go#L193-L200"},{"type":"ARTICLE","url":"https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/server/auth.go#L80-L86"},{"type":"ARTICLE","url":"https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/server/routes/tunnel.go#L26-L38"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/knowns-dev/knowns","events":[{"introduced":"0"},{"fixed":"cead30b2c3a34f66c0c40cb692ed51e588e63bd7"},{"fixed":"878a02cb7cc14f0a592fdfda7a520af3cac500fb"}],"database_specific":{"source":["DESCRIPTION","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"0.30.0"}]}}],"versions":["v0.29.1","v0.29.0","v0.28.0","v0.27.1","v0.27.0","v0.23.0","v0.26.0","v0.25.0","v0.24.1","v0.24.0","v0.22.2","v0.22.1","v0.22.0","v0.21.0","v0.20.5","v0.20.4","v0.20.3","v0.20.2","v0.20.1","v0.20.0","v0.19.2","v0.19.1","v0.19.0","v0.18.4","v0.18.3","v0.18.2","v0.18.1","v0.18.0","v0.17.1","v0.17.0","v0.16.3","v0.16.2","v0.16.1","v0.16.0","v0.15.3","v0.15.2","v0.15.1","v0.15.0","v0.12.4","v0.12.3","v0.12.2","v0.12.1","v0.12.0","v0.11.4","v0.11.3","v0.11.2","v0.11.1","v0.11.0","v0.10.6","v0.10.5","v0.10.4","v0.10.3","v0.10.2","v0.10.1","v0.10.0","v0.9.0","v0.8.9","v0.8.8","v0.8.7","v0.8.6","v0.8.5","v0.8.4","v0.8.3","v0.8.2","v0.8.1","v0.8.0","v0.7.0","v0.6.0","v0.5.0","v0.4.0","v0.3.1","v0.3.0","v0.2.1","v0.2.0","v0.1.8","v0.1.7","v0.1.6","v0.1.5","v0.1.4","v0.1.3","v0.1.2","v0.1.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86543.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}