Sandbox escape CVE-2026-2776 in Firefox <148 via Telemetry boundary
CVE-2026-2776 Published on February 24, 2026
Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software
Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, and Firefox ESR < 140.8.
Products Associated with CVE-2026-2776
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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.