CVE-2026-109745
Received Received - Intake

DOM Sandbox Escape in Firefox via Uninitialized Memory in Web Serial

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Mozilla Corporation

Description
Sandbox escape due to uninitialized memory in the DOM: Web Serial component. This vulnerability was fixed in Firefox 158 and Firefox ESR 153.5.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-13
Generated
2026-10-13
AI Q&A
2026-10-13
EPSS Evaluated
N/A
NVD
CVE-2026-109745
EUVD
EUVD-2026-98507

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
mozilla firefox 158
mozilla firefox_esr 153.5

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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 uninitialized memory in the DOM Web Serial component. It was patched in Firefox 158 and Firefox ESR 153.5.

Impact Analysis

An attacker could exploit this to run malicious code outside the browser sandbox, potentially accessing sensitive data or system resources on your device.

Mitigation Strategies

Update Firefox to version 158 or later and Firefox ESR to version 153.5 or later to patch the vulnerability.

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