{"action":"Upgrade libsixel to 1.8.6-1 or later.","affected":[{"fixed":"1.8.6-1","introduced":"0"}],"component":"libsixel","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1.8.6-1"],"id":"tcs_01M5NES2PTCZAG1MATX9N08EX4","modified_at":"2026-09-11T11:02:07.857807659Z","published_at":"2021-09-14T16:15:08.773Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2020-21049","https://security-tracker.debian.org/tracker/CVE-2020-21049"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2020-21049#Debian:14/libsixel","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2020-21049"}],"summary":"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."}