CVE-2026-2797

CRITICAL

Firefox <148 - Use After Free

Title source: llm

Description

Use-after-free in the JavaScript: GC component. This vulnerability affects Firefox < 148 and Thunderbird < 148.

References (3)

Scores

CVSS v3 9.8
EPSS 0.0004
EPSS Percentile 12.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Classification

CWE
CWE-416
Status published

Affected Products (2)

mozilla/firefox < 148.0
mozilla/thunderbird < 148.0

Timeline

Published Feb 24, 2026
Tracked Since Feb 24, 2026