CVE-2026-84637 Calendar invitation attachments could launch local executables

Malicious calendar invitations could use file URI attachments to launch local or network-hosted executables on Windows, bypassing Thunderbird's normal executable attachment protections. With the new invitation display enabled, the attachment could also appear under a misleading filename. This...

PT-2026-84524

Name of the Vulnerable Software and Affected Versions Thunderbird versions prior to 153.2 Thunderbird versions prior to 154 Description Malicious calendar invitations can utilize file URI attachments to execute local or network-hosted executables on Windows systems, bypassing standard executable...