CVE-2026-2778

Description

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

References

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

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

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

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

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

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

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3