{"schema":"threatline.record/2","record":{"id":"CVE-2026-106069","aliases":[],"summary":"A flaw in Node.js TLS hostname verification can cause a server certificate to be validated against a different IP address than the one the client connected to, when the host is a non-canonical IPv4 li","details":"A flaw in Node.js TLS hostname verification can cause a server certificate to be validated against a different IP address than the one the client connected to, when the host is a non-canonical IPv4 literal with a leading zero, such as `0127.0.0.1`.\n\n`tls.checkServerIdentity()` normalizes the host following the WHATWG URL rules, which read a leading-zero octet as octal (`0127.0.0.1` becomes `87.0.0.1`), while the connection is made through the operating system resolver, which on some platforms such as macOS reads it as decimal (`127.0.0.1`). A server at the connected address can then be authenticated with a certificate issued for another IP address.\n\nThis vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.","categories":["Runtimes & languages"],"product":"node","vendor":"nodejs","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-106069","source_modified_at":"2026-10-23T16:15:05.850Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"node","vendor":"nodejs","versions":[{"lessThanOrEqual":"22.23.3","status":"affected","version":"22.23.3","versionType":"semver"},{"lessThanOrEqual":"24.22.0","status":"affected","version":"24.22.0","versionType":"semver"},{"lessThanOrEqual":"26.12.0","status":"affected","version":"26.12.0","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":7.4,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00238,"percentile":0.14123,"score_date":"2026-10-24"},"published_at":"2026-10-23T16:15:05.850Z","modified_at":"2026-10-23T16:15:05.850Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-106069","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T16:15:05.850Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-106069","fetched_at":"2026-10-24T18:03:20.872036Z","source_modified_at":"2026-10-24"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://nodejs.org/en/blog/vulnerability/october-2026-security-releases"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"vendor and product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-23T16:15:05.850Z","content_hash":"3b956a43bd419dfe2c51fced68aa66235eb59ab74765594bb3faad8038526420"}}