CVE-2026-84141

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

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 155. Update Firefox ESR to version 153.2. Update Thunderbird to version 155. Update Thunderbird ESR to version 153.2.