CVE-2026-16359

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Firefox ESR versions prior to 115.38 Firefox ESR versions prior to 140.13 Thunderbird versions prior to 153 Thunderbird version prior to 140.13

Description Incorrect boundary conditions exist within the Audio/Video: GMP component. GMP (Gecko Media Plugins) is a mechanism used by the browser to integrate third-party media codecs.

Recommendations Update Firefox to version 153 or later. Update Firefox ESR to version 115.38 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.