CVE-2026-92040
Received Received - Intake

Use-after-free in Firefox JavaScript WebAssembly

Publication date: 2026-09-15

Last updated on: 2026-09-15

Assigner: Mozilla Corporation

Description
Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 156.

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Meta Information

Published
2026-09-15
Last Modified
2026-09-15
Generated
2026-09-15
AI Q&A
2026-09-15
EPSS Evaluated
N/A
NVD
CVE-2026-92040
EUVD
EUVD-2026-78503

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mozilla firefox 156

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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 is a use-after-free vulnerability in the JavaScript WebAssembly component of Firefox. Use-after-free means the software tries to use memory after it has been freed, which can lead to crashes or arbitrary code execution.

Impact Analysis

An attacker could exploit this to execute arbitrary code on your system, potentially allowing them to install malware, steal data, or take control of your device. It may also cause Firefox to crash repeatedly.

Mitigation Strategies

Update Firefox to version 156 or later to address the use-after-free vulnerability in the JavaScript: WebAssembly component.

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