CVE-2026-87502
Analyzed Analyzed - Analysis Complete

Confused Deputy UI Spoofing in Google Chrome

Publication date: 2026-09-09

Last updated on: 2026-09-09

Assigner: Chrome

Description
Confused deputy in Fullscreen in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to spoof UI elements via a crafted HTML page. (Chromium security severity: Low)

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Meta Information

Published
2026-09-09
Last Modified
2026-09-09
Generated
2026-09-29
AI Q&A
2026-09-09
EPSS Evaluated
2026-09-27
NVD
CVE-2026-87502
EUVD
EUVD-2026-74449

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
google chrome to 153.0.8010.36 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-441 The product receives a request, message, or directive from an upstream component, but the product does not sufficiently preserve the original source of the request before forwarding the request to an external actor that is outside of the product's control sphere. This causes the product to appear to be the source of the request, leading it to act as a proxy or other intermediary between the upstream component and the external actor.

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Executive Summary

This vulnerability is a confused deputy issue in Google Chrome's Fullscreen feature. It allows an attacker who has already compromised the renderer process to trick users into believing they are seeing legitimate UI elements through a crafted HTML page. The attacker leverages social engineering to spoof the user interface.

Detection Guidance

This vulnerability is specific to Google Chrome and requires detecting outdated versions. Check your Chrome version via chrome://settings/help or command line (e.g., chrome --version). If version is below 153.0.8010.36, it is vulnerable. No direct network detection commands are provided in the context.

Impact Analysis

This vulnerability could allow an attacker to deceive you into performing actions you wouldn't normally do by showing fake UI elements. For example, it might trick you into entering sensitive information or granting permissions under false pretenses.

Compliance Impact

This vulnerability involves a confused deputy in Fullscreen mode in Google Chrome, enabling UI spoofing via a crafted HTML page. It requires a compromised renderer process and social engineering, posing limited impact (CVSS 4.2). Compliance impact is likely minimal as it does not directly expose sensitive data but could enable phishing attacks, indirectly affecting GDPR or HIPAA if user credentials or data are manipulated.

Mitigation Strategies

Update Google Chrome to version 153.0.8010.36 or later to address the vulnerability.

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