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 115.31, 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-2025-14324

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	firefox	to 115.31.0 (exc)
mozilla	firefox	to 146.0 (exc)
mozilla	firefox	From 116.0 (inc) to 140.6.0 (exc)
mozilla	thunderbird	to 140.6.0 (exc)
mozilla	thunderbird	to 146.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-94	The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
CWE-NVD-CWE-noinfo

Attack-Flow Graph

Executive Summary

This vulnerability is a JIT (Just-In-Time) miscompilation issue in the JavaScript Engine's JIT component affecting certain versions of Firefox and Firefox ESR. 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, data corruption, or potentially allow an attacker to execute arbitrary code or bypass security mechanisms in affected Firefox versions.

Mitigation Strategies

To mitigate this vulnerability, update Firefox to version 146 or later, or Firefox ESR to version 115.31 or later for ESR 115, and to version 140.6 or later for ESR 140. These updates include fixes for the JIT miscompilation vulnerability in the JavaScript Engine. Keeping your browser up to date ensures that the security patches addressing this issue are applied. [3]

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