We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6, Firefox ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Mozilla
  • Firefox

No data.

No data.

References
Link Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=2043820 cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-15719 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-15719 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-67/ cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-69/ cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-70/ cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-70/#CVE-2026-15719 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-72/ cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-72/#CVE-2026-15719 cve-icon
History

Fri, 24 Jul 2026 00:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-501
References
Metrics threat_severity

None

 threat_severity

Critical

Thu, 23 Jul 2026 03:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-200

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

Type Values Removed Values Added
Description We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6, Firefox ESR 115.38, and Firefox ESR 140.13. We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6, Firefox ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13.
References

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

Type Values Removed Values Added
Description We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6. We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6, Firefox ESR 115.38, and Firefox ESR 140.13.
Title Site isolation in the DOM: Navigation component Site isolation issue in the DOM: Navigation component
References

Thu, 16 Jul 2026 08:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-200

Tue, 14 Jul 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'}

ssvc

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

Tue, 14 Jul 2026 13:45:00 +0000

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

Tue, 14 Jul 2026 12:45:00 +0000

Type Values Removed Values Added
Description We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6.
Title Site isolation in the DOM: Navigation component
References
cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2026-07-14T12:15:47.592Z

Updated: 2026-07-22T19:19:22.168Z

Reserved: 2026-07-14T12:15:46.894Z

Link: CVE-2026-15719

cve-icon Vulnrichment

Updated: 2026-07-14T13:33:52.400Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Critical

Publid Date: 2026-07-14T12:15:47Z

Links: CVE-2026-15719 - Bugzilla