Reachable Assertion Affecting nodejs/node package, versions [24.0.0,24.14.1)[25.0.0,25.8.2)
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-15763409
- published25 Mar 2026
- disclosed25 Mar 2026
- creditwooffie
Introduced: 25 Mar 2026
CVE-2026-21712 (opens in a new tab)How to fix?
Upgrade nodejs/node to version 24.14.1, 25.8.2 or higher.
Overview
nodejs/node is a
Affected versions of this package are vulnerable to Reachable Assertion.
in the URL processing logic. When url.format() parses a malformed Internationalized Domain Name (IDN) containing invalid characters, it triggers a reachable assertion failure in the native node_url.cc code. An unauthenticated attacker could instantly crash the Node.js process by supplying a specially crafted, malformed IDN URL to a vulnerable application that subsequently processes it with url.format().