CVE-2026-74978 is a vulnerability in Mozilla Firefox
Published on August 18, 2026
Clickjacking issue in the Widget component
Clickjacking issue in the Widget component. This vulnerability was fixed in Firefox 154 and Firefox ESR 153.1.
Products Associated with CVE-2026-74978
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Affected Versions
Mozilla Firefox:- Version 153.1, <= 153.* is unaffected.
- Version 154, <= * is unaffected.