CVE-2026-57053

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

2.5CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N

EPSS

0.1% chance of exploitation in the next 30 days; higher than 3% of CVEs (scores of 2026-10-25)

CWE

CWE-1284

Published

2026-06-23

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

Affected

• gnu:libidn

References

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

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