Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.
History

Tue, 01 Sep 2026 22:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 01 Sep 2026 22:00:00 +0000

Type Values Removed Values Added
Description Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2. Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.
References

Tue, 01 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H'}


Tue, 01 Sep 2026 13:45:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Weaknesses CWE-416
Vendors & Products Mozilla
Mozilla firefox

Tue, 01 Sep 2026 12:45:00 +0000

Type Values Removed Values Added
Description Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.
Title Sandbox escape due to use-after-free in the DOM: Navigation component
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-09-02T03:55:37.113Z

Reserved: 2026-09-01T07:25:05.711Z

Link: CVE-2026-84119

cve-icon Vulnrichment

Updated: 2026-09-01T14:22:19.203Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-01T13:20:05.713

Modified: 2026-09-02T04:18:04.063

Link: CVE-2026-84119

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-02T04:00:09Z