CVE-2025-9866

HIGH
2025-09-03 [email protected]
8.8
CVSS 3.1
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CVSS Vector

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

Lifecycle Timeline

3
Patch Released
Apr 09, 2026 - 14:30 nvd
Patch available
Analysis Generated
Mar 28, 2026 - 19:10 vuln.today
CVE Published
Sep 03, 2025 - 17:15 nvd
HIGH 8.8

Tags

Authentication Bypass Google Chrome Suse

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)

Analysis

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. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical Context

This vulnerability is classified under CWE-693. 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) Affected products include: Google Chrome. Version information: prior to 140.0.7339.80.

Affected Products

Google Chrome.

Remediation

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +44
POC: 0

Vendor Status

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CVE-2025-9866 vulnerability details – vuln.today
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