An update for thunderbird is now available for Red Hat Enterprise Linux 9.2
 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of
 Important. 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.

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

* thunderbird: JavaScript Execution via Spoofed PDF Attachment and file:///
 Link (CVE-2025-3909)

* thunderbird: Sender Spoofing via Malformed From Header in Thunderbird
 (CVE-2025-3875)

* thunderbird: Unsolicited File Download, Disk Space Exhaustion, and Credential
 Leakage via mailbox:/// Links (CVE-2025-3877)

* thunderbird: Tracking Links in Attachments Bypassed Remote Content Blocking
 (CVE-2025-3932)

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.

This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2025-3875: Authentication Bypass by Spoofing (CWE-290)
CVE-2025-3877: Exposure of Sensitive Information to an Unauthorized Actor
 (CWE-200)
CVE-2025-3909: Authentication Bypass by Spoofing (CWE-290)
CVE-2025-3932: Authentication Bypass Using an Alternate Path or Channel
 (CWE-288)