CVE-2026-106069
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`. `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. This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.
CVE-2026-106069
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-106069
node
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "nodejs",
"product": "node",
"versions": [
{
"status": "affected",
"version": "22.23.3",
"versionType": "semver",
"lessThanOrEqual": "22.23.3"
},
{
"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"
}
]- Related CVEs
- CVE-2026-106069
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #53069 · Revision 1
- Added to Heist Feed
- Publisher date