CVE-2026-57053

State: Published
Severity: 4.0 Medium
Published: Jun 23, 2026
Updated: Jun 23, 2026
Reserved: Jun 23, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	4.0 Medium	CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L	mitre

Weaknesses

CWE-1284 Improper Validation of Specified Quantity in Input

Affected Products

Product	Versions
libidnGNU	before 1.44Affected

References

https://lists.gnu.org/archive/html/help-libidn/2026-06/msg00001.html
https://lists.gnu.org/archive/html/help-libidn/2026-05/msg00000.html

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