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Vulnerability record · CVE-2026-57053 · published 23 June 2026

CVE-2026-57053: Gnu libidn vulnerability

Gnu · Libidn

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.

2.5 CVSS 3.1 Low EPSS 0.14% · top 97.3% CWE-1284 · CWE-1284
2.5CVSS 3.1 base score
0.14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 1 tagged exploit
29 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-57053), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.