CVE-2026-10702
Modified Modified - Updated After Analysis

JIT Miscompilation in Firefox JavaScript Engine

Publication date: 2026-06-02

Last updated on: 2026-06-30

Assigner: Mozilla Corporation

Description
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 151.0.3.

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Meta Information

Published
2026-06-02
Last Modified
2026-06-30
Generated
2026-07-13
AI Q&A
2026-06-02
EPSS Evaluated
2026-07-12
NVD
CVE-2026-10702
EUVD
EUVD-2026-33990

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mozilla firefox to 151.0.3 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-733 The developer builds a security-critical protection mechanism into the software, but the compiler optimizes the program such that the mechanism is removed or modified.
CWE-843 The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.

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Executive Summary

This vulnerability is a Just-In-Time (JIT) miscompilation issue in the JavaScript Engine's JIT component used by Mozilla Firefox. It means that the JIT compiler incorrectly compiles JavaScript code, which could lead to unexpected behavior or security issues. The problem was fixed in Firefox version 151.0.3.

Impact Analysis

A JIT miscompilation vulnerability in the JavaScript engine can cause incorrect execution of JavaScript code, potentially leading to security risks such as crashes, data corruption, or exploitation by attackers to execute arbitrary code. Users running vulnerable versions of Firefox before 151.0.3 could be at risk.

Mitigation Strategies

The vulnerability was fixed in Firefox version 151.0.3. To mitigate this vulnerability, you should update your Firefox browser to version 151.0.3 or later.

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