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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00096.

Exploitation none

Automatable yes

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Mozilla Firefox affected
Version Status Constraints
115.31 unaffected ≤ 115.*
140.6 unaffected ≤ 140.*
146 unaffected ≤ *
Mozilla Thunderbird affected
Version Status Constraints
140.6 unaffected ≤ 140.*
146 unaffected ≤ *

Configuration 1 [-]

OR cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*

No data.

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Vendors Products
Mozilla Subscribe
Firefox Subscribe
Firefox Esr Subscribe

Project Subscriptions

Vendors Products
Mozilla Subscribe
Firefox Subscribe
Firefox Esr Subscribe
Thunderbird Subscribe
Advisories
Source ID Title
Debian DLA Debian DLA DLA-4401-1 firefox-esr security update
Debian DLA Debian DLA DLA-4405-1 thunderbird security update
Debian DSA Debian DSA DSA-6078-1 firefox-esr security update
Debian DSA Debian DSA DSA-6081-1 thunderbird security update
Ubuntu USN Ubuntu USN USN-7991-1 Thunderbird vulnerabilities
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=1996840 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-14324 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-14324 cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-92/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-93/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-94/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-94/#CVE-2025-14324 cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-95/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-96/ cve-icon cve-icon
History

Mon, 13 Apr 2026 15:00:00 +0000

Type Values Removed Values Added
Description JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 146, Firefox ESR < 115.31, Firefox ESR < 140.6, Thunderbird < 146, and Thunderbird < 140.6. 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.

Thu, 11 Dec 2025 20:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-94
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 10 Dec 2025 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla thunderbird
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
Vendors & Products Mozilla thunderbird
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}

 cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Wed, 10 Dec 2025 18:00:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Mozilla firefox Esr
Vendors & Products Mozilla
Mozilla firefox
Mozilla firefox Esr

Wed, 10 Dec 2025 14:45:00 +0000

Type Values Removed Values Added
Description JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 146, Firefox ESR < 115.31, and Firefox ESR < 140.6. JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 146, Firefox ESR < 115.31, Firefox ESR < 140.6, Thunderbird < 146, and Thunderbird < 140.6.
References

Wed, 10 Dec 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}

threat_severity

Important

Tue, 09 Dec 2025 13:45:00 +0000

Type Values Removed Values Added
Description JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 146, Firefox ESR < 115.31, and Firefox ESR < 140.6.
Title JIT miscompilation in the JavaScript Engine: JIT component
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-04-13T14:25:33.489Z

Reserved: 2025-12-09T13:37:56.958Z

Link: CVE-2025-14324

cve-icon Vulnrichment

Updated: 2025-12-11T20:03:02.945Z

cve-icon NVD

Status : Modified

Published: 2025-12-09T16:17:39.890

Modified: 2026-04-13T15:16:45.403

Link: CVE-2025-14324

cve-icon Redhat

Severity : Important

Publid Date: 2025-12-09T13:37:57Z

Links: CVE-2025-14324 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-12-10T17:51:21Z

Weaknesses