CVE-2026-0879
Sandbox Escape in Firefox Graphics Component Before
Publication date: 2026-01-13
Last updated on: 2026-04-13
Assigner: Mozilla Corporation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mozilla | firefox | to 147 (exc) |
| mozilla | firefox_esr | to 115.32 (exc) |
| mozilla | firefox_esr | to 140.7 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-119 | The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. |
Attack-Flow Graph
AI Powered Q&A
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, immediately update Firefox to version 147 or later, or Firefox ESR to version 115.32 or later, including ESR 140.7 or later. These versions include fixes that address the sandbox escape due to incorrect boundary conditions in the Graphics component.
Can you explain this vulnerability to me?
This vulnerability is a sandbox escape caused by incorrect boundary conditions in the Graphics component of Firefox. It affects versions of Firefox before 147, Firefox ESR before 115.32, and Firefox ESR before 140.7.
How can this vulnerability impact me? :
The vulnerability can lead to a sandbox escape, which means an attacker could potentially execute code outside the restricted environment, leading to full compromise of confidentiality, integrity, and availability of the affected system.