Description
Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
Published: 2026-07-21
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Thu, 23 Jul 2026 05:45:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Mozilla thunderbird
Vendors & Products Mozilla
Mozilla firefox
Mozilla thunderbird

Wed, 22 Jul 2026 20:00:00 +0000

Type Values Removed Values Added
Description Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 153. Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
References

Wed, 22 Jul 2026 18:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-346
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 21 Jul 2026 12:45:00 +0000

Type Values Removed Values Added
Description Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 153.
Title Site isolation issue in the DOM: Navigation component
References

Subscriptions

Mozilla Firefox Thunderbird
cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-07-22T19:19:04.320Z

Reserved: 2026-07-20T21:57:29.336Z

Link: CVE-2026-16399

cve-icon Vulnrichment

Updated: 2026-07-22T17:22:14.171Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-24T04:15:03Z

Weaknesses