CVE-2026-21712CWE-20

CVE-2026-21712

Medium · published March 30, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
23.7
In the wild
Unconfirmed
What it is

A flaw in Node.js URL processing causes an assertion failure in native code when `url.format()` is called with a malformed internationalized domain name (IDN) containing invalid characters, crashing the Node.js process.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00320 · 23.7th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2026-03-30T20:16Z
Affected products (2)
ProductVersionsFixed in
nodejs/node.js≥ 24.0.0, ≤ 24.14.0—
nodejs/node.js≥ 25.0.0, ≤ 25.8.1—
References (2)
https://hackerone.com/reports/3546390 · [email protected]https://nodejs.org/en/blog/vulnerability/march-2026-security-releases · [email protected]
EPSS history
Timeline
  • 30 MAR 15:13Z
    A flaw in Node.js URL processing causes an assertion failure in native code when `url.format()` is called with a malformed internationalized domain name (IDN)…
    cvelistv5