CVE-2026-21712

EUVD-2026-17093
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.7 MEDIUM
NETWORK
LOW
LOW
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
hackeroneCNA
5.7 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Debian logo
Debian Releases
Debian Product
Codename
nodejs
bookworm
18.20.4+dfsg-1~deb12u1
fixed
bookworm (security)
18.20.4+dfsg-1~deb12u1
fixed
bullseye
12.22.12~dfsg-1~deb11u4
fixed
bullseye (security)
12.22.12~dfsg-1~deb11u7
fixed
forky
22.22.1+dfsg+~cs22.19.15-1
fixed
sid
22.22.2+dfsg+~cs22.19.15-1
fixed
trixie
20.19.2+dfsg-1
fixed
trixie (security)
20.19.2+dfsg-1+deb13u1
fixed
References
https://hackerone.com/reports/3546390
https://nodejs.org/en/blog/vulnerability/march-2026-security-releases