CVE-2025-9866

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 v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://chromereleases.googleblog.com/2025/09/stable-channel-update-for-desktop.html	Release Notes
https://issues.chromium.org/issues/379337758	Issue Tracking Permissions Required

Configurations

Configuration 1 (hide)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

History

26 Sep 2026, 00:10

Type	Values Removed	Values Added
Summary		(es) Implementación inapropiada en Extensiones en Google Chrome anterior a 140.0.7339.80 permitió a un atacante remoto eludir la política de seguridad de contenido mediante una página HTML manipulada. (Gravedad de seguridad de Chromium: Media)

Information

Published : 2025-09-03 17:15

Updated : 2026-09-26 00:10

NVD link : CVE-2025-9866

Mitre link : CVE-2025-9866

CVE.ORG link : CVE-2025-9866

JSON object : View

Products Affected

google

chrome

CWE

CWE-693

Protection Mechanism Failure

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