CVE-2020-21048: Saitoha Libsixel

Medium severity, CVSS 6.5. EPSS: 1.4% chance of exploitation in the next 30 days.

An issue in the dither.c component of libsixel prior to v1.8.4 allows attackers to cause a denial of service (DOS) via a crafted PNG file.

Affected products

• Saitoha Libsixel: before 1.8.4 (fixed in 1.8.4)

Published 2021-09-14. Last modified 2026-06-17.