{"action":"Upgrade thunderbird to 1:91.4.1-1 or later.","affected":[{"fixed":"1:91.4.1-1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1:91.4.1-1"],"id":"tcs_01M5NG01KFNTAEP4TWWDR93G94","modified_at":"2026-10-23T18:03:38.868652189Z","published_at":"2022-12-22T20:15:11.647Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-4126","https://security-tracker.debian.org/tracker/CVE-2021-4126"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-4126#Debian:14/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-4126"}],"summary":"When receiving an OpenPGP/MIME signed email message that contains an additional outer MIME message layer, for example a message footer added by a mailing list gateway, Thunderbird only considered the"}