BaseFortify

Publication date: 2025-12-09

Last updated on: 2026-04-13

Assigner: Mozilla Corporation

Description

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2025-12-09

Last Modified

2026-04-13

Generated

2026-07-06

AI Q&A

2025-12-09

EPSS Evaluated

2026-07-05

NVD

CVE-2025-14325

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	firefox	to 140.6.0 (exc)
mozilla	firefox	to 146.0 (exc)
mozilla	thunderbird	to 140.6.0 (exc)
mozilla	thunderbird	to 146.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-NVD-CWE-noinfo

Attack-Flow Graph

Executive Summary

This vulnerability is a Just-In-Time (JIT) miscompilation issue in the JavaScript Engine's JIT component in Firefox versions before 146 and Firefox ESR versions before 140.6. It means that the JIT compiler may incorrectly compile JavaScript code, potentially leading to unexpected behavior or security issues.

Impact Analysis

The impact of this vulnerability could include incorrect execution of JavaScript code, which might be exploited to cause crashes, execute arbitrary code, or bypass security mechanisms in affected Firefox versions.

Mitigation Strategies

To mitigate this vulnerability, update Firefox to version 146 or later, and Firefox ESR to version 140.6 or later. These versions include fixes for the JIT miscompilation vulnerability in the JavaScript Engine as well as other related security issues. [2]

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