CVE-2026-7320: Mozilla Firefox

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

Information disclosure due to incorrect boundary conditions in the Audio/Video component. This vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, Firefox ESR 115.35.1, Thunderbird 150.0.1, and Thunderbird 140.10.1.

Affected products

• Mozilla Firefox: before 115.35.1 (fixed in 115.35.1); before 150.0.1 (fixed in 150.0.1); from 128.0, before 140.10.1 (fixed in 140.10.1)
• Mozilla Thunderbird: before 140.10.1 (fixed in 140.10.1); before 150.0.1 (fixed in 150.0.1)

Published 2026-04-28. Last modified 2026-07-15.