CVE-2026-16369

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Firefox ESR versions prior to 140.13 Thunderbird versions prior to 153 Thunderbird versions prior to 140.13

Description An integer overflow exists in the JavaScript: WebAssembly component. An integer overflow occurs when an arithmetic operation attempts to create a numeric value that is too large to be stored in the allotted memory space.

Recommendations Update Firefox to version 153 or later. Update Firefox ESR to version 140.13 or later. Update Thunderbird to version 153 or later. Update Thunderbird to version 140.13 or later.