CVE-2026-16392

CRITICAL

JIT miscompilation in the JavaScript Engine: JIT component

Title source: cna
STIX 2.1

Description

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

References (3)

Core 3

Scores

CVSS v3 9.1
EPSS 0.0039
EPSS Percentile 31.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-670 CWE-843
Status published
Products (2)
Mozilla/Firefox 153
Mozilla/Thunderbird 153
Published Jul 21, 2026
Tracked Since Jul 21, 2026