{"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:13","exploited":false,"fixed_versions":["1.8.6-1"],"id":"tcs_01M5NES83GAT8AB2B9G8NRJ2XZ","modified_at":"2026-10-26T12:00:49.934527228Z","published_at":"2021-09-17T21:15:07.360Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2020-21548","https://security-tracker.debian.org/tracker/CVE-2020-21548"],"severity":{"label":"high","score":8.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2020-21548#Debian:13/libsixel","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2020-21548"}],"summary":"Libsixel 1.8.3 contains a heap-based buffer overflow in the sixel_encode_highcolor function in tosixel.c."}