CVE-2026-18003 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: Low)
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Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a user interface spoofing issue that existed in Google Chrome for iOS versions prior to 151.0.7922.72, classified as a low severity Chromium security issue. The flaw stemmed from an inadequate implementation of security mechanisms within the mobile browser's rendering engine, specifically affecting how Chrome for iOS handled certain HTML page elements and their visual presentation. Attackers could exploit this weakness by crafting malicious HTML content that would manipulate the browser's user interface in ways that could deceive users into believing they were interacting with legitimate web pages when they were actually engaging with fraudulent interfaces.
The technical nature of this vulnerability falls under CWE-611, which addresses improper access control and specifically relates to insecure direct object references or UI manipulation flaws. The issue manifested through the browser's failure to properly validate and sanitize HTML elements that could influence the visual presentation layer, allowing attackers to potentially overlay malicious content over legitimate user interface components. This type of vulnerability can be particularly dangerous in mobile environments where screen real estate is limited and users may be more susceptible to deception due to reduced ability to verify page authenticity.
From an operational perspective, this UI spoofing vulnerability could enable attackers to conduct phishing attacks or social engineering campaigns where users might be tricked into entering sensitive information or performing actions they would not normally undertake. The attack vector typically involves hosting malicious HTML content on compromised websites that could be accessed through various means such as email links, social media, or drive-by downloads. Users accessing these crafted pages could be deceived into believing they were interacting with trusted websites while actually encountering fraudulent interfaces designed to capture credentials or other sensitive data.
The mitigation strategy for this vulnerability primarily involves updating Chrome for iOS to version 151.0.7922.72 or later, which would include the necessary patches addressing the UI spoofing implementation issues. Additionally, users should maintain awareness of suspicious website behavior and avoid clicking on links from untrusted sources. Organizations should implement security awareness training programs to help users recognize potential phishing attempts and establish processes for regularly updating mobile browser applications. Network administrators can also deploy web filtering solutions that block access to known malicious domains while ensuring proper patch management protocols are in place to maintain up-to-date browser versions across all devices within their environments. This vulnerability aligns with ATT&CK technique T1531 which focuses on credential access through deceptive user interfaces and can be addressed through defensive measures such as browser hardening configurations and user education initiatives that emphasize the importance of verifying website authenticity before entering sensitive information.