An update for firefox 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 Firefox is an open-source web browser, designed for standards
 compliance, performance, and portability.

Security Fix(es):

* firefox: thunderbird: Privilege escalation in Firefox Updater (CVE-2025-2817)

* firefox: thunderbird: Unsafe attribute access during XPath parsing
 (CVE-2025-4087)

* firefox: thunderbird: Process isolation bypass using "javascript:"
 URI links in cross-origin frames (CVE-2025-4083)

* firefox: thunderbird: Memory safety bugs fixed in Firefox 138, Thunderbird
 138, Firefox ESR 128.10, and Thunderbird 128.10 (CVE-2025-4091)

* firefox: thunderbird: Memory safety bug fixed in Firefox ESR 128.10 and
 Thunderbird 128.10 (CVE-2025-4093)

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-2025-2817: Improper Control of Generation of Code ('Code
 Injection') (CWE-94)
CVE-2025-4083: Improper Isolation or Compartmentalization (CWE-653)
CVE-2025-4087: Out-of-bounds Read (CWE-125)
CVE-2025-4091: Buffer Copy without Checking Size of Input ('Classic Buffer
 Overflow') (CWE-120)
CVE-2025-4093: Buffer Copy without Checking Size of Input ('Classic Buffer
 Overflow') (CWE-120)