---
title: "CVE-2026-87570: Google Chrome - Authorization Bypass"
description: "Google Chrome < 153.0.8010.36 contains an authorization bypass caused by incorrect authorization in SiteIsolation, letting remote attackers who compromised the renderer process bypass site isolation via crafted files, exploit requires social engineering."
url: https://panop.io/threat-heartbeat/CVE-2026-87570/
---

# CVE-2026-87570 Google Chrome - Authorization Bypass

Google Chrome < 153.0.8010.36 contains an authorization bypass caused by incorrect authorization in SiteIsolation, letting remote attackers who compromised the renderer process bypass site isolation via crafted files, exploit requires social engineering.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.31% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-87570)

## Details

Type

Authorization Bypass

Impact

Broken Access Control

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Published

9 September 2026

Updated

15 October 2026

Weakness

[CWE-863](https://cwe.mitre.org/data/definitions/863.html)

## Vendor fix

Update to version 153.0.8010.36 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-87570](https://nvd.nist.gov/vuln/detail/CVE-2026-87570)
- [https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop\_0808145027.html](https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html)
- [https://issues.chromium.org/issues/517215407](https://issues.chromium.org/issues/517215407)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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