CVE-2026-12315 is a vulnerability in Mozilla Firefox
Published on June 16, 2026
Mitigation bypass in the DOM: Security component
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 152 and Firefox ESR 140.12.
Products Associated with CVE-2026-12315
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Affected Versions
Mozilla Firefox:- Version 140.12, <= 140.* is unaffected.
- Version 152, <= * is unaffected.