Red Hat Security Advisory 2021-5046-03 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 91.4.0. Issues addressed include buffer overflow, bypass, denial of service, and spoofing vulnerabilities.
ee077d75c706a7539579ac412e98e5621f6c04a089dd2ee6f67bcb62dc92c562