Red Hat Security Advisory 2021-4130-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 91.3.0. Issues addressed include bypass, spoofing, and use-after-free vulnerabilities.
e8817b7475fcd78d00b1e034f0f524743e2b13cedea16cb733a200b676c97c57