CVE-2026-16397: Mozilla Firefox

Medium severity, CVSS 6.5. EPSS: 0.2% chance of exploitation in the next 30 days.

Clickjacking issue in the WebExtensions component in Firefox for Android. This vulnerability was fixed in Firefox 153.

Affected products

• Mozilla Firefox: before 153.0.0 (fixed in 153.0.0)

Published 2026-07-21. Last modified 2026-07-22.