DNS Rebinding Affecting nodejs/node package, versions [22.0.0, 22.23.0)[23.0.0, 24.17.0)[25.0.0, 26.3.1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-NODEJSNODE-17674738
- published29 Jun 2026
- disclosed26 Jun 2026
- credittmeletlidis
Introduced: 26 Jun 2026
CVE-2026-48930 (opens in a new tab)How to fix?
Upgrade nodejs/node to version 22.23.0, 24.17.0, 26.3.1 or higher.
Overview
Affected versions of this package are vulnerable to DNS Rebinding in dns.lookup() (lib/dns.js) and lookupAndConnect() (lib/net.js), which forward a hostname containing an embedded NUL byte to the native resolver bindings where the C string is truncated at the first NUL. An attacker can cause an application to resolve and connect to a different authority than the one its JavaScript-level validation or logging observed by supplying a hostname such as attacker.com\0.allowed.example.com, because the resolver acts on the truncated prefix while the JavaScript string retains the full value.