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
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.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| 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
KEV
| CWE ID | Description |
|---|---|
| CWE-1384 | The product does not properly handle unexpected physical or environmental conditions that occur naturally or are artificially induced. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know
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