Improper Input Validation in Google Chrome Preload

Publication date: 2026-08-25

Last updated on: 2026-08-25

Assigner: Chrome

Description

Improper input validation in Preload in Google Chrome prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process to bypass web origin policy via a crafted HTML page. (Chromium security severity: Medium)

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-25

Last Modified

2026-08-25

Generated

2026-08-26

AI Q&A

2026-08-26

EPSS Evaluated

N/A

NVD

CVE-2026-79214

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	152.0.7977.65

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 Google Chrome's Preload feature. A remote attacker who already compromised the renderer process could exploit it to bypass web origin policy by using a specially crafted HTML page.

Impact Analysis

If exploited, this vulnerability could allow an attacker to bypass security restrictions, potentially accessing or manipulating data from different origins than intended. This could lead to unauthorized data access or actions on behalf of the user.

Mitigation Strategies

Update Google Chrome to version 152.0.7977.65 or later to address the improper input validation issue in Preload.

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