CVE-2026-17826 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 who convinced a user to engage in specific UI gestures to leak cross-origin data 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 cross-origin data leakage issue affecting Google Chrome for iOS versions prior to 151.0.7922.72, classified as a medium severity flaw by Chromium security standards. The vulnerability stems from an improper implementation in the mobile browser's handling of user interface interactions, specifically when users are诱导ed to perform particular gestures on malicious web pages. The attack vector requires social engineering to convince victims to engage in specific UI manipulations, making it a user-interaction dependent exploit rather than an automated attack.
The technical flaw manifests in how Chrome for iOS processes cross-origin navigation and data handling during user gesture sequences. When users are tricked into performing predetermined UI gestures on a crafted HTML page, the browser's security boundaries are effectively bypassed, allowing unauthorized access to data from different origins. This vulnerability operates at the intersection of browser sandboxing mechanisms and user interaction handling, where the expected security model fails to properly isolate cross-origin resources during specific gesture sequences.
The operational impact of this vulnerability extends beyond simple information disclosure, as it could enable attackers to access sensitive user data, session information, or private communications from other websites. The medium severity classification indicates that while the attack requires user interaction and specific conditions, the potential for data leakage remains significant enough to warrant immediate attention. Attackers could leverage this flaw to build sophisticated phishing campaigns or cross-site scripting attacks that exploit the trust users place in their browser environment.
From a cybersecurity framework perspective, this vulnerability maps to CWE-20: Improper Input Validation and CWE-124: Buffer Underflow, as it involves improper handling of user input through gesture sequences and potential underflow conditions in security boundary enforcement. The attack pattern aligns with ATT&CK technique T1566.002: Phishing: Spearphishing Attachment, where the initial compromise occurs through user interaction with malicious content rather than direct system exploitation.
Mitigation strategies should prioritize immediate browser updates to version 151.0.7922.72 or later, which contains the necessary patches to address the improper UI gesture handling. Organizations should also implement user awareness training to recognize social engineering attempts that might lead to such vulnerabilities, as well as monitor for suspicious website behavior that might indicate exploitation attempts. Network security teams should consider implementing web filtering solutions that can detect and block known malicious patterns associated with this vulnerability class, particularly in environments where users may be more susceptible to targeted attacks.