CVE-2026-5866

8.8

Google · Chrome

A use after free vulnerability in the Media component of Google Chrome allows remote attackers to execute arbitrary code via a crafted HTML page.

Executive summary

A high-severity use after free vulnerability in Google Chrome could allow a remote attacker to execute arbitrary code on a user system via a malicious webpage.

Vulnerability

This vulnerability is a use after free flaw (CWE-416) within the Media component of the browser. It allows an unauthenticated remote attacker to achieve arbitrary code execution within the browser sandbox by enticing a user to navigate to a specifically crafted HTML page.

Business impact

The potential for arbitrary code execution poses a significant risk to organizational security, as it could lead to full system compromise, data theft, or the installation of persistent malware. With a CVSS score of 8.8, this flaw represents a high risk that requires immediate attention to prevent exploitation in environments where users frequently access external web content.

Remediation

Immediate Action: Update all Google Chrome installations to version 147.0.7727.55 or later to apply the necessary security patches.

Proactive Monitoring: Monitor endpoint security logs for anomalous browser process behavior or unexpected crashes that may indicate exploitation attempts.

Compensating Controls: Ensure that enterprise security policies restrict access to untrusted web content and maintain up-to-date endpoint protection software to detect malicious code execution.

Exploitation status

Public Exploit Available: No — there is no confirmed public exploit or weaponized code available in the provided data.

Analyst recommendation

Given the severity of this vulnerability and its potential impact on endpoint integrity, organizations should treat this update as a high priority. IT administrators must ensure that all browser instances are updated to the patched version across the fleet immediately to mitigate the risk of remote code execution.

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