CVE-2025-14330 | JIT miscompilation in the JavaScript Engine: JIT component. … | CVSS 9.8 CRITICAL

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.

Metadata

CVE ID: CVE-2025-14330
State: PUBLISHED
Assigner: mozilla
Reserved: 2025-12-09 13:38 UTC
Published: 2025-12-09 13:38 UTC
Last updated: 2026-04-13 14:25 UTC
Primary CWE: CWE-686
CWE-686 Function Call With Incorrect Argument Type
Vendor / Product: Mozilla / Firefox
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: total

Affected products (2)

Vendor	Product	Platform	Versions
Mozilla	Firefox	—	140.6 ≤ 140., 146 ≤
Mozilla	Thunderbird	—	140.6 ≤ 140., 146 ≤

Weakness (CWE)

CWE	Source	Description
CWE-119	adp	CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-686	adp	CWE-686 Function Call With Incorrect Argument Type
CWE-843	adp	CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	adp	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (5)