CVE-2026-100794
Received Received - Intake

Firefox Internationalization Component Boundary Condition Sandbox Escape

Publication date: 2026-09-29

Last updated on: 2026-09-29

Assigner: Mozilla Corporation

Description
Sandbox escape due to incorrect boundary conditions in the Internationalization component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.

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Meta Information

Published
2026-09-29
Last Modified
2026-09-29
Generated
2026-09-29
AI Q&A
2026-09-29
EPSS Evaluated
N/A
NVD
CVE-2026-100794
EUVD
EUVD-2026-88946

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
mozilla firefox 153.4
mozilla firefox 157
mozilla firefox 140.17

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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 allows an attacker to escape the sandbox due to incorrect boundary conditions in the Internationalization component of Firefox. It was patched in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.

Impact Analysis

An attacker could exploit this to break out of the sandbox, potentially gaining unauthorized access to system resources or executing arbitrary code on your device.

Mitigation Strategies

Update Firefox ESR to version 153.4 or higher, Firefox to version 157 or higher, or Firefox ESR 140.17 or higher to address the sandbox escape vulnerability in the Internationalization component.

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