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CVE-2025-14330

Date: December 9, 2025

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 146 and Firefox ESR < 140.6.

Severity Score

9.8

Related Resources (7)

Url: https://www.mozilla.org/security/advisories/mfsa2025-92/

Url: https://bugzilla.mozilla.org/show_bug.cgi?id=1997503

Url: https://nvd.nist.gov/vuln/detail/CVE-2025-14330

Url: https://www.mozilla.org/security/advisories/mfsa2025-95/

Url: https://www.mozilla.org/security/advisories/mfsa2025-94/

Url: https://www.mozilla.org/security/advisories/mfsa2025-96/

Url: https://www.mend.io/vulnerability-database/CVE-2025-14330

Severity Score

9.8

Weakness Type (CWE)

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-119

Access of Resource Using Incompatible Type ('Type Confusion')

CWE-843

Function Call With Incorrect Argument Type

CWE-686

CVSS v3.1

Base Score:	9.8
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	HIGH
Integrity (I):	HIGH
Availability (A):	HIGH

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