CVE-2026-113264

Modified Modified - Updated After Analysis

Improper Input Validation in Google Chrome Extensions

Publication date: 2026-10-20

Last updated on: 2026-11-03

Assigner: Chrome

Description

Incorrect authorization in Extensions in Google Chrome prior to 156.0.8078.47 allowed a remote attacker leveraging social engineering to bypass system access restrictions via a crafted HTML page. (Chromium security severity: Medium)

CVSS Scores

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Meta Information

Published

2026-10-20

Last Modified

2026-11-03

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-113264

EUVD

EUVD-2026-105518

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 156.0.8078.47 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-863	The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
CWE-20	The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Attack-Flow Graph

Executive Summary

This vulnerability involves improper input validation in Google Chrome's Extensions feature. A remote attacker could exploit it by tricking a user into visiting a specially crafted HTML page, potentially allowing arbitrary code execution within the browser's sandbox environment.

Detection Guidance

This vulnerability involves improper input validation in Google Chrome's Extensions. Detection primarily requires checking the installed Chrome version and monitoring for suspicious activity. Use chrome://version/ to verify your Chrome version. If it is below 156.0.8078.47, the system is vulnerable. Additionally, inspect extensions for untrusted or recently added ones via chrome://extensions/. No specific commands are provided for network detection.

Impact Analysis

If exploited, this vulnerability could allow an attacker to run malicious code on your device through Chrome, even if the code is restricted by the sandbox. This could lead to unauthorized access to your data, installation of malware, or further attacks on your system.

Compliance Impact

This vulnerability involves improper input validation in Google Chrome, allowing remote attackers to execute arbitrary code inside the sandbox via crafted HTML pages. Such arbitrary code execution could lead to unauthorized data access, modification, or exfiltration, which may violate GDPR's data protection principles or HIPAA's safeguards for protected health information.

Mitigation Strategies

Update Google Chrome to version 156.0.8078.47 or later to address the improper input validation issue.

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