CVE-2026-2778

Description

Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

PUBLISHED Reserved 2026-02-19 | Published 2026-02-24 | Updated 2026-04-16 | Assigner mozilla

Product status

Credits

Sajeeb Lohani

References

bugzilla.mozilla.org/show_bug.cgi?id=2016358

www.mozilla.org/security/advisories/mfsa2026-13/

www.mozilla.org/security/advisories/mfsa2026-14/

www.mozilla.org/security/advisories/mfsa2026-15/

www.mozilla.org/security/advisories/mfsa2026-16/

www.mozilla.org/security/advisories/mfsa2026-17/

cve.org (CVE-2026-2778)

nvd.nist.gov (CVE-2026-2778)

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