UBUNTU-CVE-2026-14899

The code to parse MIME headers for display when forwarding a message if the setting to view all headers was enabled had an off-by-one error, allowing a single byte to be read from the memory after the buffer for the headers, and potentially crashing Thunderbird. This vulnerability was fixed in...

PT-2026-63484

Name of the Vulnerable Software and Affected Versions Thunderbird versions prior to 153 Thunderbird versions prior to 140.13 Description An off-by-one error exists in the code used to parse MIME headers Multipurpose Internet Mail Extensions for display when forwarding a message, specifically when...