Mitigation bypass in the DOM: postMessage component. This vulnerability was fixed in Firefox 150.

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Fixes

Solution

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Workaround

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History

Tue, 21 Apr 2026 16:45:00 +0000

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

Tue, 21 Apr 2026 14:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-352
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

ssvc

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


Tue, 21 Apr 2026 13:15:00 +0000

Type Values Removed Values Added
Description Mitigation bypass in the DOM: postMessage component. This vulnerability was fixed in Firefox 150.
Title Mitigation bypass in the DOM: postMessage component
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-04-21T13:47:18.972Z

Reserved: 2026-04-21T12:40:51.062Z

Link: CVE-2026-6755

cve-icon Vulnrichment

Updated: 2026-04-21T13:47:11.033Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-04-21T13:16:21.510

Modified: 2026-04-21T15:48:44.543

Link: CVE-2026-6755

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-21T16:30:40Z

Weaknesses