CVE-2020-21048

MEDIUM 6.5CVE-2020-21048 · Published 14/09/2021 · updated 17/06/2026

In short

CVE-2020-21048 is a MEDIUM (CVSS 6.5) vulnerability affecting libsixel (saitoha).
Chance of exploitation in the next 30 days (EPSS): 1.4%, higher than 72.0% of all vulnerabilities.
Fix: update to 1.8.4 or later.

Package	Affected versions	Patched versions
libsixel saitoha	`< 1.8.4`	`1.8.4`

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.

Running one of these products? Scan your site to see whether it exposes a vulnerable version.

Package

Affected versions

Patched versions

< 1.8.4

1.8.4

More vulnerabilities in libsixel

See all →