{"action":"Upgrade thunderbird to 1:91.4.0-1 or later.","affected":[{"fixed":"1:91.4.0-1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["1:91.4.0-1"],"id":"tcs_01M5NG1JM21200AVPRKQAK4VGA","modified_at":"2026-10-23T18:04:16.609130391Z","published_at":"2021-12-08T22:15:09.620Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-43537","https://security-tracker.debian.org/tracker/CVE-2021-43537"],"severity":{"label":"high","score":8.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-43537#Debian:13/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-43537"}],"summary":"An incorrect type conversion of sizes from 64bit to 32bit integers allowed an attacker to corrupt memory leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Fi"}