CVE-2026-74978

HighCVSS 8.1/10Last modified Aug 25, 2026

Description

Clickjacking issue in the Widget component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-1021

Affected software

No affected versions have been published.

Timeline

Published
Aug 18, 2026
Last modified
Aug 25, 2026
NVD status
Analyzed

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CVE-2026-74978: High severity, CVSS 8.1 | Vulnix