CVE-2026-17874 in Chrome
Summary
by MITRE • 07/30/2026
Inappropriate implementation in Chrome for iOS in Google Chrome on iOS prior to 151.0.7922.72 allowed a remote attacker to perform UI spoofing via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a significant UI spoofing flaw in Google Chrome for iOS that emerged from an inadequate implementation of security controls within the browser's rendering engine. The issue stems from how Chrome for iOS handles certain HTML page elements and their visual presentation, creating an opportunity for remote attackers to manipulate the user interface in ways that could deceive users into believing they are interacting with legitimate web content. The vulnerability specifically affects versions prior to 151.0.7922.72, indicating a targeted security gap that was addressed through subsequent updates.
The technical nature of this flaw lies in the browser's insufficient validation and sanitization of HTML elements that control user interface presentation. Attackers could craft malicious web pages containing carefully constructed HTML code that exploits how Chrome for iOS renders certain visual components, potentially allowing them to overlay deceptive interfaces or manipulate the appearance of legitimate browser controls. This type of vulnerability falls under the broader category of user interface manipulation attacks where the attacker's goal is to create confusion and potentially trick users into performing unintended actions.
The operational impact of this vulnerability extends beyond simple visual deception to potential security implications for user trust and data integrity. When users encounter a spoofed interface, they may unknowingly interact with malicious elements that appear to be legitimate browser components or website features. This could lead to various security incidents including credential theft, unauthorized transactions, or the execution of malicious commands that users believe are safe due to the deceptive interface presentation. The medium severity classification reflects the potential for significant user deception combined with the relatively straightforward exploitation method.
From a cybersecurity perspective, this vulnerability aligns with several ATT&CK framework techniques including T1566 (Phishing) and T1071.001 (Application Layer Protocol: Web Protocols), as it leverages web-based delivery mechanisms to create deceptive user experiences. The flaw also relates to CWE-693 (Protection Mechanism Failure) which encompasses situations where security controls fail to properly protect against attacks that could manipulate user interfaces or perceptions. Organizations should consider this vulnerability in their broader threat modeling activities, particularly when evaluating mobile browser security risks and user interface integrity controls.
The recommended mitigations include immediate deployment of Chrome for iOS version 151.0.7922.72 or later, which contains the necessary patches to address the UI spoofing implementation gap. Security teams should also implement user awareness training to help identify potential spoofing attempts, particularly when users encounter unexpected interface changes or elements that seem out of place during web browsing activities. Additionally, organizations may want to consider implementing network-level monitoring to detect and alert on suspicious HTML content delivery patterns that could indicate attempts to exploit this vulnerability. Regular security updates and patch management processes should be reinforced to ensure timely deployment of browser security fixes across all mobile platforms in use within the organization's infrastructure.