CVE-2020-21049

PoC —

CVSS 3.1

6.5 medium

EPSS

1%p71

Published

Sep 14, 2021 (Sep 14, 2021)

Modified

Jun 17, 2026

Description

An invalid read in the stb_image.h component of libsixel prior to v1.8.5 allows attackers to cause a denial of service (DOS) via a crafted PSD file.

Vendors: saitoha
Products: libsixel
Weakness: CWE-125
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (1.4%)

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