{"id":"CVE-2026-106069","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-106069","generatedAt":"2026-10-28T01:00:51.764Z","title":"This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.","description":"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**.","published":"2026-10-23T17:17:20.000Z","lastModified":"2026-10-23T19:42:25.000Z","status":"Awaiting Analysis","sourceIdentifier":"support@hackerone.com","cvss":{"version":"3.0","score":7.4,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"},"cwe":["CWE-295"],"affected":[],"epss":{"score":0.00275,"percentile":0.19786,"date":"2026-10-26","history":[{"date":"2026-10-24","score":0.00238,"percentile":0.14123}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.27%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-23T17:17:20.000Z","detail":{"score":"7.4","severity":"HIGH","publishedAt":"2026-10-23T17:17:19.740Z"},"summary":"New CVE, high severity (CVSS 7.4)."}],"references":[{"url":"https://nodejs.org/en/blog/vulnerability/october-2026-security-releases","source":"support@hackerone.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-106069","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}