Vulnerability 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 Score
4.0
MEDIUM
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Libidn | >= 0.1.15, < 1.44 |
Related Weaknesses (CWE)
References
- https://lists.gnu.org/archive/html/help-libidn/2026-05/msg00000.htmlExploitMailing List
- https://lists.gnu.org/archive/html/help-libidn/2026-06/msg00001.htmlMailing List
FAQ
What is CVE-2026-57053?
CVE-2026-57053 is a vulnerability with a CVSS score of 4.0 (MEDIUM). 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.
How severe is CVE-2026-57053?
CVE-2026-57053 has been rated MEDIUM with a CVSS base score of 4.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-57053?
Check the references section above for vendor advisories and patch information. Affected products include: Gnu Libidn.