CVE-2026-100796
Received Received - Intake

Use-after-free in Firefox JavaScript WebAssembly

Publication date: 2026-09-29

Last updated on: 2026-09-29

Assigner: Mozilla Corporation

Description
Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 157.

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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-2026-100796
EUVD
EUVD-2026-88949

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mozilla firefox 157

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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 Firefox's JavaScript WebAssembly component. Use-after-free means the software tries to use memory after it has been freed, which can lead to crashes or arbitrary code execution. It was fixed in Firefox version 157.

Impact Analysis

An attacker could exploit this to crash your browser or run malicious code on your system. This might allow them to steal data, install malware, or take control of your device if you visit a specially crafted website.

Mitigation Strategies

Update Firefox to version 157 or later to address the use-after-free vulnerability in the JavaScript: WebAssembly component.

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