CVE-2026-87499: Google Chrome vulnerability

Q: What must an attacker achieve before this issue can be exploited?

The attacker must first compromise the Chrome renderer process. They can then use a crafted HTML page to bypass site isolation.

Q: Which Chrome versions need to be updated?

Google Chrome versions earlier than 153.0.8010.36 are affected. Updating to 153.0.8010.36 or later addresses the affected version range.

Q: What security boundary is weakened by this vulnerability?

The issue allows a compromised renderer process to bypass Chrome's site isolation boundary. This could undermine separation between sites after renderer compromise.

Published Sep 9, 2026

Updated

Incorrect authorization in Network in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: High)

Affected Software

1 affected component

Google Chrome<153.0.8010.36

Event History

Sep 9, 2026

CVE Published

via MITRE·12:09 AM

Data Sourced

via MITRE·12:09 AM

DescriptionWeakness

Frequently Asked Questions

What must an attacker achieve before this issue can be exploited?

The attacker must first compromise the Chrome renderer process. They can then use a crafted HTML page to bypass site isolation.

Which Chrome versions need to be updated?

Google Chrome versions earlier than 153.0.8010.36 are affected. Updating to 153.0.8010.36 or later addresses the affected version range.

What security boundary is weakened by this vulnerability?

The issue allows a compromised renderer process to bypass Chrome's site isolation boundary. This could undermine separation between sites after renderer compromise.