CVE-2019-18224

PoC —

CVSS 3.1

9.8 critical

EPSS

4%p89

Published

Oct 21, 2019 (Oct 21, 2019)

Modified

Jun 17, 2026

Description

idn2_to_ascii_4i in lib/lookup.c in GNU libidn2 before 2.1.1 has a heap-based buffer overflow via a long domain string.

Vendors: gnu
Products: libidn2
Weakness: CWE-787
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (3.7%)

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