CVE-2026-57053

MEDIUM

GNU Libidn < 1.44 - Improper Validation of Specified Quantity in Input

Title source: rule

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.

References (2)

Core 2

Core 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

Scores

CVSS v3 4.0

EPSS 0.0011

EPSS Percentile 1.5%

Attack Vector LOCAL

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-1284

Status published

Products (2)

GNU/libidn < 1.44

gnu/libidn 0.1.15 - 1.44

Published Jun 23, 2026

Tracked Since Jun 23, 2026