VULNERABILITY INTELLIGENCE
CVE-2026-84139
CVSS score6.1 MEDIUM
EPSS probability0.34%
CISA KEVNot currently listed
Published2026-09-01
Last modified2026-09-03
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Description
Clickjacking issue in the DOM: Events component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
Weakness classification
- nvd@nist.gov: CWE-1021
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-1021
Primary references
- security@mozilla.org — Issue Tracking, Permissions Required
- security@mozilla.org — Vendor Advisory
- security@mozilla.org — Vendor Advisory
- security@mozilla.org — Vendor Advisory
- security@mozilla.org — Vendor Advisory