CVE-2026-0889

HIGH

Mozilla Firefox < 147.0 - Denial of Service

Title source: rule

Description

Denial-of-service in the DOM: Service Workers component. This vulnerability affects Firefox < 147 and Thunderbird < 147.

References (3)

Scores

CVSS v3 7.5
EPSS 0.0002
EPSS Percentile 5.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Classification

CWE
CWE-400
Status published

Affected Products (2)

mozilla/firefox < 147.0
mozilla/thunderbird < 147.0

Timeline

Published Jan 13, 2026
Tracked Since Feb 18, 2026