CVE-2026-6755

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

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

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-352

Affected software

No affected versions have been published.

Timeline

Published
Apr 21, 2026
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2026-6755: Medium severity, CVSS 6.5 | Vulnix