CVE-2026-124931 is a vulnerability in Mozilla Firefox
Published on November 10, 2026
Same-origin policy bypass in the DOM: Core & HTML component
Same-origin policy bypass in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.
Products Associated with CVE-2026-124931
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Affected Versions
Mozilla Firefox:- Version 153.7, <= 153.* is unaffected.
- Version 160, <= * is unaffected.