CVE-2026-78943

Analyzed Analyzed - Analysis Complete

Improper Input Validation in Google Chrome

Publication date: 2026-08-25

Last updated on: 2026-08-28

Assigner: Chrome

Description

Improper input validation in Editing in Google Chrome prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process and leveraged social engineering 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

2026-08-28

Generated

2026-09-15

AI Q&A

2026-08-26

EPSS Evaluated

2026-09-13

NVD

CVE-2026-78943

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 152.0.7977.65 (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 is an improper input validation issue in Google Chrome before version 152.0.7977.65. It allows a remote attacker who has already compromised the renderer process to bypass web origin policy through a crafted HTML page. The attacker would need to use social engineering to trick a user into interacting with the page.

Detection Guidance

This vulnerability involves improper input validation in Google Chrome's Editing feature. Detection primarily requires checking the installed Chrome version and monitoring for suspicious renderer process activity. No specific commands are provided in the available context to directly detect this issue.

Impact Analysis

If exploited, this vulnerability could allow an attacker to bypass security restrictions and access or modify data from different websites than intended. This could lead to theft of sensitive information, unauthorized actions on behalf of the user, or further compromise of the user's system.

Compliance Impact

This vulnerability involves improper input validation in Google Chrome, enabling an attacker to bypass web origin policy through social engineering and a crafted HTML page. While it does not directly impact GDPR or HIPAA compliance, such vulnerabilities could potentially lead to unauthorized data access or processing, which may violate these regulations if exploited.

Mitigation Strategies

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

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