CVE-2026-118336

Received Received - Intake

Improper Input Validation in Google Chrome Leads to Code Execution

Publication date: 2026-10-27

Last updated on: 2026-10-27

Assigner: Chrome

Description

Improper input validation in Headless in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-10-27

Last Modified

2026-10-27

Generated

2026-10-28

AI Q&A

2026-10-28

EPSS Evaluated

N/A

NVD

CVE-2026-118336

EUVD

EUVD-2026-111446

Affected Vendors & Products

Vendor	Product	Version / Range
Google	Chrome	156.0.8078.73

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
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 is an improper input validation issue in Google Chrome's Headless mode. It allows a remote attacker to execute arbitrary code inside the sandbox by tricking a user into visiting a specially crafted HTML page. The flaw exists in Chrome versions prior to 156.0.8078.73.

Detection Guidance

I don't know

Detection requires checking the installed version of Google Chrome against the patched version (156.0.8078.73). Use commands like 'google-chrome --version' or check via package manager (e.g., 'apt list --installed | grep chrome' on Debian/Ubuntu).

Inspect network traffic for suspicious HTML pages or code execution attempts targeting Headless Chrome.

Impact Analysis

If exploited, this vulnerability could allow an attacker to run malicious code on your device without your knowledge. This could lead to unauthorized access to sensitive data, installation of malware, or other harmful actions while bypassing Chrome's security sandbox.

Mitigation Strategies

Update Google Chrome to version 156.0.8078.73 or later immediately. Disable Headless Chrome if not required. Monitor for unusual activity or unauthorized code execution.

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