CVE-2025-9866

—

CVSS 3.1

8.8 high

EPSS

<1%p30

Published

Sep 3, 2025 (Sep 3, 2025)

Modified

Jun 17, 2026

Description

Inappropriate implementation in Extensions in Google Chrome prior to 140.0.7339.80 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Medium)

Vendors: google
Products: chrome
Weakness: CWE-693
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.4%)

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