CVE-2025-9866

HIGH EPSS 27.2%

Published Sep 3, 20259mo ago · Modified Jun 17, 20261w ago

8.8 CVSS 3.1

High

Published Sep 3, 2025 9mo ago

Last Modified Jun 17, 2026 1w ago

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)

CVSS Details

Base Score

8.8

Exploitability

2.8

Impact

5.9

Vector string

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

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction Required

Scope Unchanged

Confidentiality High

Integrity High

Availability High

Threat Intelligence

EPSS Exploit Probability

27.2% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-693

Affected Products 1

Vendor	Product	Version	Range
google	chrome	*	<140.0.7339.80

References 2

chromereleases.googleblog.com https://chromereleases.googleblog.com/2025/09/stable-channel-update-for-desktop.html

Release Notes
issues.chromium.org https://issues.chromium.org/issues/379337758

Issue TrackingPermissions Required

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.