CVE-2026-87553

Analyzed Analyzed - Analysis Complete

Improper Input Validation in Google Chrome

Publication date: 2026-09-09

Last updated on: 2026-09-10

Assigner: Chrome

Description

Improper input validation in SiteIsolation in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-09

Last Modified

2026-09-10

Generated

2026-09-29

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-87553

EUVD

EUVD-2026-74311

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 153.0.8010.36 (exc)

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 involves improper input validation in SiteIsolation in Google Chrome before version 153.0.8010.36. A remote attacker who compromised the renderer process could potentially execute arbitrary code outside the sandbox by tricking a user into visiting a crafted HTML page.

Detection Guidance

This vulnerability is specific to Google Chrome versions prior to 153.0.8010.36. To detect it, check your Chrome version by running chrome://version/ in the browser address bar. If your version is below 153.0.8010.36, the system is vulnerable. Update Chrome immediately to the latest version to mitigate the risk.

Impact Analysis

If exploited, this vulnerability could allow an attacker to run malicious code on your device, bypassing security restrictions. This could lead to unauthorized access to sensitive data, installation of malware, or further compromise of your system.

Compliance Impact

This vulnerability allows a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. This could lead to unauthorized data access, modification, or exfiltration, which may violate GDPR (data protection) and HIPAA (health information confidentiality) requirements depending on the affected system and data involved.

Mitigation Strategies

Update Google Chrome to version 153.0.8010.36 or later to address the improper input validation issue in SiteIsolation.

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