{"action":"Upgrade thunderbird to 1:91.3.0-1 or later.","affected":[{"fixed":"1:91.3.0-1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["1:91.3.0-1"],"id":"tcs_01M5NG1GPD7VM0178K5CYN1WFS","modified_at":"2026-10-23T18:04:16.842831167Z","published_at":"2023-02-16T22:15:10.810Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-43529","https://security-tracker.debian.org/tracker/CVE-2021-43529"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-43529","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-43529"}],"summary":"Thunderbird versions prior to 91.3.0 are vulnerable to the heap overflow described in CVE-2021-43527 when processing S/MIME messages. Thunderbird versions 91.3.0 and later will not call the vulnerable"}