{"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_01M5NEXR2HGFYKS5299FX95MCN","modified_at":"2026-09-11T11:02:42.034766245Z","published_at":"2021-01-07T14:15:11.673Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2020-26971","https://security-tracker.debian.org/tracker/CVE-2020-26971"],"severity":{"label":"high","score":8.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2020-26971#Debian:13/firefox-esr","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2020-26971"}],"summary":"Certain blit values provided by the user were not properly constrained leading to a heap buffer overflow on some video drivers. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox"}