Firefox sandbox escape via DOM boundary conditions <148
CVE-2026-2778 Published on February 24, 2026
Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component
Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, and Firefox ESR < 140.8.
Products Associated with CVE-2026-2778
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Affected Versions
Mozilla Firefox:- Version unspecified and below 148 is affected.
- Version unspecified and below 115.33 is affected.
- Version unspecified and below 140.8 is affected.
- Version unspecified and below 148 is affected.
- Version unspecified and below 140.8 is affected.