CVE-2026-11658
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Chrome Extensions Input Validation Bypass

Publication date: 2026-06-09

Last updated on: 2026-06-09

Assigner: Chrome

Description
Insufficient validation of untrusted input in Extensions in Google Chrome prior to 149.0.7827.103 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: High)
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Meta Information
Published
2026-06-09
Last Modified
2026-06-09
Generated
2026-06-09
AI Q&A
2026-06-09
EPSS Evaluated
N/A
NVD
EUVD
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
google chrome to 149.0.7827.103 (exc)
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Exploitability
CWE
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KEV
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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.
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Executive Summary

This vulnerability involves insufficient validation of untrusted input in the Extensions component of Google Chrome versions prior to 149.0.7827.103.

A remote attacker who has already compromised the renderer process can exploit this flaw by using a specially crafted HTML page to bypass site isolation protections.

Impact Analysis

The vulnerability allows an attacker to bypass site isolation, which is a security feature designed to separate different websites and prevent malicious code from accessing data across sites.

By bypassing site isolation, an attacker could potentially access sensitive information from other sites or processes that should be isolated, increasing the risk of data theft or unauthorized access.

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