CVE-2026-4692 Details
Description
Sandbox escape in the Responsive Design Mode component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
A sandbox escape vulnerability has been identified in the Responsive Design Mode component of Mozilla Firefox. This issue affects Firefox versions prior to 149, as well as Firefox ESR versions prior to 115.34 and prior to 140.9. The vulnerability arises from incorrect boundary conditions, which can be exploited to escape the sandbox environment.
Users can upgrade to Firefox 149 or Firefox ESR 115.34 or 140.9 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 25, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
| CWE-653 | Improper Isolation or Compartmentalization | redhat-SADP |
Affected Products
| Product | Versions |
|---|---|
| mozilla firefox | < 115.34.0 < 149.0 >= 128.0, < 140.9.0 |
CPE
Remediation
| |
| mozilla thunderbird | < 140.9.0 < 149.0 |
CPE
Remediation
| |
Change History
9 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 15, 2026 | CVE Modified | redhat-SADP |
| Jun 30, 2026 | CVE Modified | redhat-SADP |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 13, 2026 | CVE Modified | [email protected] |
| Mar 25, 2026 | Initial Analysis | [email protected] |
| Mar 25, 2026 | CVE Modified | CISA-ADP |
| Mar 24, 2026 | CVE Modified | [email protected] |
| Mar 24, 2026 | New CVE Received | [email protected] |