CVE-2026-105483

{"id": "CVE-2026-105483", "cveTags": [], "metrics": {"cvssMetricV30": [{"type": "Secondary", "source": "support@hackerone.com", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 7.4, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 2.2}]}, "affected": [{"source": "support@hackerone.com", "affectedData": [{"vendor": "nodejs", "product": "node", "versions": [{"status": "affected", "version": "24.22.0", "versionType": "semver", "lessThanOrEqual": "24.22.0"}, {"status": "affected", "version": "26.12.0", "versionType": "semver", "lessThanOrEqual": "26.12.0"}], "defaultStatus": "unaffected"}]}], "published": "2026-10-23T17:17:19.573", "references": [{"url": "https://nodejs.org/en/blog/vulnerability/october-2026-security-releases", "source": "support@hackerone.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "support@hackerone.com", "description": [{"lang": "en", "value": "CWE-295"}]}], "descriptions": [{"lang": "en", "value": "A flaw in Node.js TLS hostname verification allows a certificate without a matching IP address SAN to authenticate a connection to an IPv4 address when the host is written with non-ASCII characters, such as fullwidth digits (`\uff11\uff12\uff17.0.0.1`).\n\n`tls.checkServerIdentity()` did not recognize such hosts as IP addresses, even though they normalize and resolve to a regular IPv4 address, and matched them against the certificate DNS names and Common Name instead. A certificate containing `DNS:127.0.0.1` or `DNS:*.0.0.1` could therefore be accepted for an IP endpoint it was not issued for. This is a regression introduced after the fix for CVE-2026-48618.\n\nThis vulnerability affects Node.js **26.x** and **24.x**."}], "lastModified": "2026-10-23T19:42:24.553", "sourceIdentifier": "support@hackerone.com"}