{"action":"Upgrade thunderbird to 1:78.6.0-1 or later.","affected":[{"fixed":"1:78.6.0-1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["1:78.6.0-1"],"id":"tcs_01M5NEXRGGK2800KXS3W82PWQY","modified_at":"2026-10-26T12:02:41.701399091Z","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/thunderbird","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"}