CVE-2026-57053

CVE-2026-57053 affects GNU libidn before 1.44, with out-of-bounds reads of uninitialized memory in the ToUnicode APIs due to mishandling in idna_to_unicode_internal; the vulnerable code is not present in libidn2. The CVSSv3.1 base score is 4.0 (Medium), with LOCAL attack vector, HIGH complexity, ...