CVE-2026-74956

Description

Same-origin policy bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 154 and Firefox ESR 153.1.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2032406
• https://www.mozilla.org/security/advisories/mfsa2026-74/
• https://www.mozilla.org/security/advisories/mfsa2026-77/