CVE-2026-117976

HighCVSS 8.1/10Last modified Nov 5, 2026

Description

Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

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-346

Affected software

No affected versions have been published.

Timeline

Published
Oct 27, 2026
Last modified
Nov 5, 2026
NVD status
Deferred

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CVE-2026-117976: High severity, CVSS 8.1 | Vulnix