{"action":"Upgrade firefox-esr to 78.6.0esr-1 or later.","affected":[{"fixed":"78.6.0esr-1","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["78.6.0esr-1"],"id":"tcs_01M5NEXRXM5P79N49A2QSQX8RC","modified_at":"2026-10-26T12:02:41.790567470Z","published_at":"2021-01-07T14:15:11.893Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2020-26973","https://security-tracker.debian.org/tracker/CVE-2020-26973"],"severity":{"label":"high","score":8.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2020-26973#Debian:13/firefox-esr","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2020-26973"}],"summary":"Certain input to the CSS Sanitizer confused it, resulting in incorrect components being removed. This could have been used as a sanitizer bypass. This vulnerability affects Firefox < 84, Thunderbird <"}