CVE-2026-12321
Received Received - Intake
JIT Miscompilation in Firefox JavaScript WebAssembly

Publication date: 2026-06-16

Last updated on: 2026-06-16

Assigner: Mozilla Corporation

Description
JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 152.
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Meta Information
Published
2026-06-16
Last Modified
2026-06-16
Generated
2026-06-16
AI Q&A
2026-06-16
EPSS Evaluated
N/A
NVD
CVE-2026-12321
EUVD
EUVD-2026-37067
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
mozilla firefox 152
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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 is a Just-In-Time (JIT) miscompilation issue in the JavaScript WebAssembly component of Firefox. It means that the JIT compiler incorrectly compiles WebAssembly code, which could lead to unexpected behavior or security issues. The problem was addressed and fixed in Firefox version 152.

Impact Analysis

A JIT miscompilation vulnerability in the WebAssembly component could potentially cause incorrect execution of code, which might be exploited to cause crashes, data corruption, or other unintended behavior in Firefox. However, specific impacts or exploit scenarios are not detailed in the provided information.

Compliance Impact

There is no information available regarding the impact of this vulnerability on compliance with standards such as GDPR or HIPAA.

Mitigation Strategies

The vulnerability was fixed in Firefox 152. To mitigate this vulnerability, you should update your Firefox browser to version 152 or later.

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