CVE-2026-16392

Analyzed Analyzed - Analysis Complete

JIT Miscompilation in Firefox JavaScript Engine

Publication date: 2026-07-21

Last updated on: 2026-08-06

Assigner: Mozilla Corporation

Description

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-21

Last Modified

2026-08-06

Generated

2026-08-10

AI Q&A

2026-07-21

EPSS Evaluated

2026-08-09

NVD

CVE-2026-16392

EUVD

EUVD-2026-46229

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	thunderbird	to 153.0 (exc)
mozilla	firefox	to 153.0.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-670	The code contains a control flow path that does not reflect the algorithm that the path is intended to implement, leading to incorrect behavior any time this path is navigated.
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.

Attack-Flow Graph

Executive Summary

This is a JIT miscompilation vulnerability in the JavaScript Engine component of Firefox. It was fixed in Firefox version 153. Miscompilation means the Just-In-Time compiler incorrectly translates JavaScript code, potentially leading to unexpected behavior or security issues.

Detection Guidance

Detection requires checking Firefox version. If using Firefox 152 or earlier, the system is vulnerable. Update to Firefox 153 or later to remediate.

Impact Analysis

This vulnerability could allow attackers to execute arbitrary code or crash the browser by exploiting the JIT miscompilation. Users running vulnerable Firefox versions may face stability issues or security risks like remote code execution.

Compliance Impact

The provided CVE data does not specify how this vulnerability affects compliance with standards like GDPR or HIPAA. The description only mentions a JIT miscompilation issue in Firefox without details on potential data exposure or security impacts relevant to compliance.

Mitigation Strategies

Update Firefox to version 153 or later to address the JIT miscompilation vulnerability in the JavaScript Engine.

Hi! I’m here to help you understand CVE-2026-16392. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70