CVE-2026-2760
Received Received - Intake
Sandbox Escape in Firefox WebRender Due to Boundary Error

Publication date: 2026-02-24

Last updated on: 2026-04-13

Assigner: Mozilla Corporation

Description
Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
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Meta Information
Published
2026-02-24
Last Modified
2026-04-13
Generated
2026-06-16
AI Q&A
2026-02-24
EPSS Evaluated
2026-06-14
NVD
CVE-2026-2760
Affected Vendors & Products
Showing 5 associated CPEs
Vendor Product Version / Range
mozilla firefox to 148.0 (exc)
mozilla thunderbird to 148.0 (exc)
mozilla firefox to 115.33.0 (exc)
mozilla firefox From 128.0 (inc) to 140.8.0 (exc)
mozilla thunderbird to 140.8.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-1384 The product does not properly handle unexpected physical or environmental conditions that occur naturally or are artificially induced.
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Executive Summary

This vulnerability is a sandbox escape caused by incorrect boundary conditions in the Graphics: WebRender component of Firefox. It affects versions of Firefox earlier than 148, Firefox ESR earlier than 115.33, and Firefox ESR earlier than 140.8.

Impact Analysis

The vulnerability allows an attacker to escape the sandbox environment, potentially enabling them to execute code or perform actions outside the restricted sandbox. This can lead to unauthorized access or control over the affected system.

Compliance Impact

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