{"id":"CVE-2026-102612","summary":"BACnet Stack: BACnet/SC hub never requires a client cert, so any host joins the mesh unauthenticated","details":"BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to versions 1.4.6, 1.5.2, and 1.6.1, bws_srv_start() in ports/linux/websocket-srv.c builds the libwebsockets server context with a CA certificate loaded but never sets LWS_SERVER_OPTION_REQUIRE_VALID_OPENSSL_CLIENT_CERT, so the hub accepts TLS connections from clients presenting no certificate at all. Any network-reachable host can join the BACnet/SC mesh without credentials. This issue has been patched in versions 1.4.6, 1.5.2, 1.6.1, and 1.7.0.","aliases":["GHSA-92q2-p4vr-fvmp"],"modified":"2026-11-14T10:45:24.215714639Z","published":"2026-11-13T18:43:21.138Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-295"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102612.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102612.json"},{"type":"FIX","url":"https://github.com/bacnet-stack/bacnet-stack/pull/1436"},{"type":"ADVISORY","url":"https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-92q2-p4vr-fvmp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102612"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/bacnet-stack/bacnet-stack","events":[{"introduced":"0"},{"fixed":"92e503566c990269f85ee15370d88415ad7ff6fb"},{"introduced":"61a7a53bea5b5bc4724646abbce601fd26c364b6"},{"fixed":"d2468d56de3d156659a9051c95119e3a6e11c421"},{"introduced":"9bc3cfa07aab98852de432fa24079f4b4b6b7eed"},{"fixed":"7a53f0a72a92de1621d30fc63703a29afe12bfaf"}],"database_specific":{"extracted_events":[{"source":"AFFECTED_FIELD","strategy":"StringRangeExpression","range":[{"introduced":"0"},{"fixed":"1.4.6"}]},{"range":[{"introduced":"1.5.0"},{"fixed":"1.5.2"}],"source":"AFFECTED_FIELD","strategy":"StringRangeExpression"},{"range":[{"introduced":"1.6.0"},{"fixed":"1.6.1"}],"source":"AFFECTED_FIELD","strategy":"StringRangeExpression"}]}}],"versions":["bacnet-stack-1.4.5","bacnet-stack-1.5.1","bacnet-stack-1.6.0","bacnet-stack-1.4.4","bacnet-stack-1.5.0","bacnet-stack-1.4.3","bacnet-stack-1.4.0","bacnet-stack-1.3.8","bacnet-stack-1.3.7","bacnet-stack-1.3.6","bacnet-stack-1.3.5","bacnet-stack-1.3.4","bacnet-stack-1.3.3","bacnet-stack-1.3.2","bacnet-stack-1.3.1","bacnet-stack-1.3.0","bacnet-stack-1.2.0","bacnet-stack-1.1.1","bacnet-stack-1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102612.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}