CVE-2026-84125

Name of the Vulnerable Software and Affected Versions Mozilla Firefox versions prior to 155 Mozilla Firefox ESR versions prior to 153.2

Description A use-after-free issue exists within the DOM: Core and HTML components. A use-after-free occurs when an application continues to use a pointer after it has been freed, which can lead to crashes or arbitrary code execution.

Recommendations Update Mozilla Firefox to version 155. Update Mozilla Firefox ESR to version 153.2.