CVE-2026-2786

Published Feb 24, 2026

Last updated 16 days ago

CVSS critical 9.8
Mobile device

Overview

Description
Use-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 148, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.
Source
security@mozilla.org
NVD status
Modified
Products
firefox, thunderbird

Risk scores

CVSS 3.1

Type
Primary
Base score
9.8
Impact score
5.9
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity
CRITICAL

Weaknesses

nvd@nist.gov
CWE-416

Social media

Hype score
Not currently trending

Configurations