CVE-2026-57053CWE-1284

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

Medium · published June 23, 2026

CVSS v3.1
4.0
EPSS
0%
Percentile
3.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.0 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00139 · 3.0th percentile
Weakness
CWE-1284 · Improper Validation of Specified Quantity in Input
Published
2026-06-23T16:40Z
EPSS history
Timeline
  • 23 JUN 16:40Z
    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
    cvelistv5