CVE-2025-14330: Vulnerability in Mozilla Firefox
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.
AI Analysis
Technical Summary
CVE-2025-14330 is a critical vulnerability caused by just-in-time (JIT) compilation miscompilation within the JavaScript Engine's JIT component in Mozilla Firefox and Thunderbird. This flaw could lead to severe impacts including potential arbitrary code execution due to memory corruption. The issue was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6. The vulnerability is part of a set of security fixes released by Mozilla on December 9, 2025, addressing multiple high-impact bugs. The vendor advisory explicitly states the fix availability and provides references to the relevant bug reports.
Potential Impact
The vulnerability has a CVSS score of 9.8 (critical), indicating it can lead to complete compromise of confidentiality, integrity, and availability of the affected products. Exploitation could allow an attacker to execute arbitrary code or cause significant memory corruption. However, no known exploits in the wild have been reported. The impact is mitigated by the availability of official fixes in the specified Firefox and Thunderbird versions.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6. Users and administrators should update to these versions or later to remediate the vulnerability. Since the vulnerability is fixed in these releases, no additional mitigation steps are required beyond applying the official updates.
CVE-2025-14330: Vulnerability in Mozilla Firefox
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-14330 is a critical vulnerability caused by just-in-time (JIT) compilation miscompilation within the JavaScript Engine's JIT component in Mozilla Firefox and Thunderbird. This flaw could lead to severe impacts including potential arbitrary code execution due to memory corruption. The issue was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6. The vulnerability is part of a set of security fixes released by Mozilla on December 9, 2025, addressing multiple high-impact bugs. The vendor advisory explicitly states the fix availability and provides references to the relevant bug reports.
Potential Impact
The vulnerability has a CVSS score of 9.8 (critical), indicating it can lead to complete compromise of confidentiality, integrity, and availability of the affected products. Exploitation could allow an attacker to execute arbitrary code or cause significant memory corruption. However, no known exploits in the wild have been reported. The impact is mitigated by the availability of official fixes in the specified Firefox and Thunderbird versions.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6. Users and administrators should update to these versions or later to remediate the vulnerability. Since the vulnerability is fixed in these releases, no additional mitigation steps are required beyond applying the official updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2025-12-09T13:38:05.412Z
- Cvss Version
- null
- State
- PUBLISHED
Threat ID: 69382835abbdc4595cd484f1
Added to database: 12/9/2025, 1:46:29 PM
Last enriched: 4/14/2026, 11:40:16 AM
Last updated: 5/9/2026, 11:41:11 PM
Views: 188
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