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CVE-2026-57053

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.

SeverityMedium
CVSS4.0
Exploit probability—
ProductGnu Libidn
PublishedJun 23, 2026
First seenJun 23, 2026
Weakness typeCWE-1284CWE-1284

How to fix

Update
  • gnu libidn1.44 or later

Affected products

ProductAffected versionsFixed in
gnu libidn0.1.15 ≤ v < 1.441.44

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