Mozilla · Firefox · CVE-2026-16402
**Name of the Vulnerable Software and Affected Versions**
Firefox versions prior to 153
Thunderbird versions prior to 153
**Description**
An integer overflow exists within the Graphics: ImageLib component. An integer overflow occurs when an arithmetic operation attempts to create a numeric value that exceeds the maximum size of the integer type used to store it.
**Recommendations**
Update Firefox to version 153.
Update Thunderbird to version 153.