CVE-2022-34474: Mozilla Firefox

Medium severity, CVSS 6.1. EPSS: 0.4% chance of exploitation in the next 30 days.

Even when an iframe was sandboxed with <code>allow-top-navigation-by-user-activation</code>, if it received a redirect header to an external protocol the browser would process the redirect and prompt the user as appropriate. This vulnerability affects Firefox < 102.

Affected products

• Mozilla Firefox: before 102.0 (fixed in 102.0)

Published 2022-12-22. Last modified 2026-06-17.