{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-86543", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-09-07T22:18:53.235Z", "datePublished": "2026-09-07T23:03:20.773Z", "dateUpdated": "2026-09-07T23:03:20.773Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-09-07T23:03:20.773Z"}, "datePublic": "2026-08-16T00:00:00.000Z", "title": "knowns before 0.30.0 Unauthenticated Management API Exposure", "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Missing Authentication for Critical Function", "cweId": "CWE-306", "type": "CWE"}]}], "affected": [{"vendor": "knowns-dev", "product": "knowns", "defaultStatus": "unaffected", "packageURL": "pkg:npm/knowns", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "0.30.0"}, {"version": "0.30.0", "status": "unaffected", "versionType": "semver"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "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", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 9.3, "baseSeverity": "CRITICAL"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL"}}], "references": [{"url": "https://github.com/knowns-dev/knowns/security/advisories/GHSA-fc85-99vc-9c75", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-fc85-99vc-9c75)"}, {"url": "https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/server/auth.go#L80-L86", "tags": ["technical-description"], "name": "AuthManager.Middleware is a no-op when no password is configured (v0.29.1)"}, {"url": "https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/cli/browser.go#L193-L200", "tags": ["technical-description"], "name": "Browser listener binds 0.0.0.0 (v0.29.1)"}, {"url": "https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/server/routes/tunnel.go#L26-L38", "tags": ["technical-description"], "name": "POST /api/tunnel/start has no authorization check of its own (v0.29.1)"}, {"url": "https://github.com/knowns-dev/knowns/commit/878a02cb7cc14f0a592fdfda7a520af3cac500fb", "tags": ["patch"], "name": "knowns fix commit 878a02cb7cc1"}, {"url": "https://github.com/knowns-dev/knowns/releases/tag/v0.30.0", "tags": ["release-notes"], "name": "knowns v0.30.0 Release Notes"}, {"name": "VulnCheck Advisory: knowns before 0.30.0 Unauthenticated Management API Exposure", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/knowns-before-0.30.0-unauthenticated-management-api-exposure"}], "credits": [{"lang": "en", "value": "Tong Hoang Gia", "type": "reporter"}, {"lang": "en", "value": "Nguyen Huy Hoang", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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