CVE-2023-50762: Debian Linux

Medium severity, CVSS 4.3. EPSS: 0.6% chance of exploitation in the next 30 days.

When processing a PGP/MIME payload that contains digitally signed text, the first paragraph of the text was never shown to the user. This is because the text was interpreted as a MIME message and the first paragraph was always treated as an email header section. A digitally signed text from a different context, such as a signed GIT commit, could be used to spoof an email message. This vulnerability affects Thunderbird < 115.6.

Affected products

• Debian Debian Linux: version 11.0 only; version 12.0 only
• Mozilla Thunderbird: before 115.6 (fixed in 115.6)

Published 2023-12-19. Last modified 2026-06-17.