CVE-2026-92030

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 156 Firefox ESR versions prior to 140.16 Firefox ESR versions prior to 153.3 Thunderbird versions prior to 156 Thunderbird versions prior to 140.16 Thunderbird versions prior to 153.3

Description A mitigation bypass exists within the Document Object Model (DOM) specifically affecting the Copy & Paste and Drag & Drop component. The DOM is a programming interface for web documents that represents the page so that programs can change the document structure, style, and content.

Recommendations Update Firefox to version 156 or later. Update Firefox ESR to version 140.16 or later. Update Firefox ESR to version 153.3 or later. Update Thunderbird to version 156 or later. Update Thunderbird to version 140.16 or later. Update Thunderbird to version 153.3 or later.