RHSA-2022:4772 — Security Advisory
Red Hat Security Advisory: thunderbird security update
Severity
CriticalRed Hat Product Security
Products
Official CSAF product identity
Published · May 28, 2022
Updated · November 22, 2025
Topic
An update for thunderbird is now available for Red Hat Enterprise Linux 9.
Red Hat Product Security has rated this update as having a security impact of Critical. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
Mozilla Thunderbird is a standalone mail and newsgroup client.
This update upgrades Thunderbird to version 91.9.1.
Security Fix(es):
-
Mozilla: Untrusted input used in JavaScript object indexing, leading to prototype pollution (CVE-2022-1529)
-
Mozilla: Prototype pollution in Top-Level Await implementation (CVE-2022-1802)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.