CVE-2026-12294

Description

Sandbox escape in the DOM: Workers component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.

PUBLISHED Reserved 2026-06-15 | Published 2026-06-16 | Updated 2026-06-16 | Assigner mozilla

Product status

Credits

Quy Pham

References

bugzilla.mozilla.org/show_bug.cgi?id=2039873

www.mozilla.org/security/advisories/mfsa2026-57/

www.mozilla.org/security/advisories/mfsa2026-58/

www.mozilla.org/security/advisories/mfsa2026-59/

www.mozilla.org/security/advisories/mfsa2026-60/

www.mozilla.org/security/advisories/mfsa2026-61/

cve.org (CVE-2026-12294)

nvd.nist.gov (CVE-2026-12294)

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