VULNERABILITY INTELLIGENCE

CVE-2026-6755

CVSS score6.5 MEDIUM
EPSS probability0.25%
CISA KEVNot currently listed
Published2026-04-21
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Description

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

Weakness classification

  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-352

Primary references