CVE-2020-11721: Saitoha Libsixel

Medium severity, CVSS 6.5. EPSS: 0.9% chance of exploitation in the next 30 days.

load_png in loader.c in libsixel.a in libsixel 1.8.6 has an uninitialized pointer leading to an invalid call to free, which can cause a denial of service.

Affected products

• Saitoha Libsixel: version 1.8.6 only

Published 2020-04-12. Last modified 2026-06-17.