CVE-2026-21712
5.7
MEDIUM
CVSS 3.1
EPSS 0.03%
Description
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.
How to fix CVE-2026-21712
To remediate CVE-2026-21712, upgrade the affected package to a fixed version below.
- Alpine/nodejs—upgrade to 24.14.1-r0 or later
- Bitnami/node—upgrade to 24.14.1 or later
- —upgrade to 24.14.1 or later
- —no fix listed
Is CVE-2026-21712 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 24.14.1-r0
- >= 24.0.0, < 24.14.1, >= 25.0.0, < 25.8.2
- >= 24.0.0, < 24.14.1, >= 25.0.0, < 25.8.2
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.7 | CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H |