CVE-2026-12297
Received Received - Intake
Sandbox Escape in Firefox Due to Boundary Condition Error

Publication date: 2026-06-16

Last updated on: 2026-06-16

Assigner: Mozilla Corporation

Description
Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, and Firefox ESR 115.37.
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Meta Information
Published
2026-06-16
Last Modified
2026-06-16
Generated
2026-06-16
AI Q&A
2026-06-16
EPSS Evaluated
N/A
NVD
CVE-2026-12297
EUVD
EUVD-2026-37088
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
mozilla firefox 152
mozilla firefox_esr 140.12
mozilla firefox_esr 115.37
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is a sandbox escape caused by incorrect boundary conditions in the Networking component of Firefox. It allows an attacker to break out of the restricted environment (sandbox) that is designed to isolate processes and limit their access, potentially enabling unauthorized actions or access.

Impact Analysis

The impact of this vulnerability could be significant as it allows an attacker to escape the sandbox environment. This could lead to unauthorized access to system resources, execution of arbitrary code, or compromise of user data and system integrity.

Mitigation Strategies

To mitigate this vulnerability, update Firefox to version 152 or later, or Firefox ESR to version 140.12 or later, or Firefox ESR to version 115.37 or later, where the issue has been fixed.

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