{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-106069", "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1", "state": "PUBLISHED", "assignerShortName": "hackerone", "dateReserved": "2026-10-06T15:00:00.654Z", "datePublished": "2026-10-23T16:15:05.850Z", "dateUpdated": "2026-10-23T16:15:05.850Z"}, "containers": {"cna": {"descriptions": [{"lang": "en", "value": "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**."}], "affected": [{"defaultStatus": "unaffected", "vendor": "nodejs", "product": "node", "versions": [{"version": "22.23.3", "status": "affected", "lessThanOrEqual": "22.23.3", "versionType": "semver"}, {"version": "24.22.0", "status": "affected", "lessThanOrEqual": "24.22.0", "versionType": "semver"}, {"version": "26.12.0", "status": "affected", "lessThanOrEqual": "26.12.0", "versionType": "semver"}]}], "references": [{"url": "https://nodejs.org/en/blog/vulnerability/october-2026-security-releases"}], "metrics": [{"cvssV3_0": {"version": "3.0", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "baseScore": 7.4, "baseSeverity": "HIGH"}}], "problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "cweId": "CWE-295", "description": "CWE-295 Improper Certificate Validation"}]}], "providerMetadata": {"orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1", "shortName": "hackerone", "dateUpdated": "2026-10-23T16:15:05.850Z"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "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"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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**."}], "id": "CVE-2026-106069", "lastModified": "2026-10-23T19:42:24.553", "metrics": {"cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.0"}, "exploitabilityScore": 2.2, "impactScore": 5.2, "source": "[email protected]", "type": "Secondary"}]}, "published": "2026-10-23T17:17:19.740", "references": [{"source": "[email protected]", "url": "https://nodejs.org/en/blog/vulnerability/october-2026-security-releases"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-295"}], "source": "[email protected]", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "22.23.3"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "24.22.0"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "26.12.0"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "node", "source": "cna", "vendor": "nodejs"}, "product": "nodejs", "vendor": "nodejs"}], "created": "2026-10-23T17:45:17.766344+00:00", "title": "Node.js TLS Hostname Verification Mismatch for Leading-Zero IPv4 Addresses", "updated": "2026-10-23T21:45:14.250811+00:00", "vendors": ["nodejs", "nodejs$PRODUCT$nodejs"]}