CVE-2026-57053 | GNU libidn before 1.44 is prone to out-of-bounds reads of un… | CVSS 4.0 MEDIUM

Description

GNU libidn before 1.44 is prone to out-of-bounds reads of uninitialized memory in the ToUnicode APIs because of mishandling in idna_to_unicode_internal. The affected code is not present in libidn2.

Metadata

CVE ID: CVE-2026-57053
State: PUBLISHED
Assigner: mitre
Reserved: 2026-06-23 16:40 UTC
Published: 2026-06-23 16:40 UTC
Last updated: 2026-06-23 17:40 UTC
Primary CWE: CWE-1284
CWE-1284 Improper Validation of Specified Quantity in Input
Vendor / Product: GNU / libidn
Sources: cve.org · NVD

Severity & Metrics

4.0 MEDIUM CVSS 3.1

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
GNU	libidn	—	0 < 1.44

Weakness (CWE)

CWE	Source	Description
CWE-1284	cna	CWE-1284 Improper Validation of Specified Quantity in Input

CVSS scores (1)

Score	Severity	Version	Source	Vector
4.0	MEDIUM	3.1	cna	CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L

References (2)