{"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:12","exploited":false,"fixed_versions":["1.8.6-1"],"id":"tcs_01M5NES252ASMYCWFKX30TEXHQ","modified_at":"2026-09-11T11:02:02.978623503Z","published_at":"2021-09-14T16:15:08.403Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2020-21048","https://security-tracker.debian.org/tracker/CVE-2020-21048"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2020-21048","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2020-21048"}],"summary":"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."}