CVE-2026-12311
Received Received - Intake
Security Sandbox Escape in Firefox

Publication date: 2026-06-16

Last updated on: 2026-06-16

Assigner: Mozilla Corporation

Description
Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152 and Firefox ESR 140.12.
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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-2026-12311
EUVD
EUVD-2026-37102
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
mozilla firefox 152
mozilla firefox_esr 140.12
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability involves information disclosure and sandbox escape within the Security: Process Sandboxing component of Mozilla Firefox. It allows an attacker to potentially bypass the sandbox restrictions designed to isolate processes, which could lead to unauthorized access to information or system resources.

Impact Analysis

The vulnerability can impact users by allowing attackers to escape the sandbox environment, potentially leading to unauthorized information disclosure or access to system resources that should be isolated. This could compromise the security and privacy of the affected system.

Mitigation Strategies

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

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