CVE-2026-84640

CVE-2026-84640 is a one-byte buffer over-read in the mail header parser of Mozilla Thunderbird, triggered by a maliciously constructed mail header. The vulnerability is rated CVSS 3.1 7.5 (HIGH) with a vector of AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N , indicating a network-exploitable flaw requiring...