Description
Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.
Published: 2026-06-16
Score: 9.1 Critical
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

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Advisories

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History

Tue, 16 Jun 2026 19:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-346
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

ssvc

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


Tue, 16 Jun 2026 16:45:00 +0000

Type Values Removed Values Added
Description Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 152 and Firefox ESR 140.12. Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.
References

Tue, 16 Jun 2026 15:15:00 +0000

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

Tue, 16 Jun 2026 13:15:00 +0000

Type Values Removed Values Added
Description Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 152 and Firefox ESR 140.12.
Title Same-origin policy bypass in the Networking: Cookies component
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-06-16T18:55:05.212Z

Reserved: 2026-06-15T15:08:12.234Z

Link: CVE-2026-12304

cve-icon Vulnrichment

Updated: 2026-06-16T18:48:15.088Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-06-16T13:16:30.643

Modified: 2026-06-16T20:16:27.673

Link: CVE-2026-12304

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-16T15:00:06Z

Weaknesses