CVE-2026-12456

Inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.155 allowed an attacker who convinced a user to install a malicious extension to bypass same origin policy via a crafted Chrome Extension. (Chromium security severity: High)

CVSS v3 4.2 MEDIUM

4.2^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_01750511403.html	Vendor Advisory
https://issues.chromium.org/issues/517124587	Permissions Required

Configurations

Configuration 1 (hide)

AND

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

OR	cpe:2.3:o:apple:macos:-:::::::*
	cpe:2.3:o:linux:linux_kernel:-:::::::*
	cpe:2.3:o:microsoft:windows:-:::::::*

History

26 Oct 2026, 12:10

Type	Values Removed	Values Added
Summary		(es) Implementación inapropiada en extensiones en Google Chrome anterior a 149.0.7827.155 permitía a un atacante que convenciera a un usuario de instalar una extensión maliciosa eludir la política del mismo origen mediante una extensión de Chrome manipulada. (Gravedad de seguridad de Chromium: Alta)

Information

Published : 2026-06-17 13:20

Updated : 2026-10-26 12:10

NVD link : CVE-2026-12456

Mitre link : CVE-2026-12456

CVE.ORG link : CVE-2026-12456

JSON object : View

Products Affected

google

chrome

linux

linux_kernel

apple

macos

microsoft

windows

CWE

CWE-20

Improper Input Validation

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