Using remote content in OpenPGP encrypted messages can lead to the disclosure of plaintext. This vulnerability affects Thunderbird < 128.4.3 and Thunderbird < 132.0.1.
https://www.mozilla.org/security/advisories/mfsa2024-62/
https://www.mozilla.org/security/advisories/mfsa2024-61/
https://lists.debian.org/debian-lts-announce/2024/11/msg00017.html