CVE-2026-11271 in Chrome
Summary
by MITRE • 06/05/2026
Inappropriate implementation in Passwords in Google Chrome prior to 149.0.7827.53 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: Low)
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 06/05/2026
This vulnerability represents a cross-origin data leakage issue within Google Chrome's password handling mechanisms that existed prior to version 149.0.7827.53. The flaw stems from an inadequate implementation of password management features that fails to properly enforce cross-origin security boundaries when processing user interactions. The vulnerability specifically manifests when a remote attacker can诱导 a user to perform predetermined user interface gestures on a maliciously crafted html page, which then exploits the browser's password handling logic to extract sensitive data from different origins.
The technical nature of this vulnerability aligns with CWE-200, which addresses information exposure through improper implementation of access controls, and CWE-284, which covers improper access control mechanisms. The attack vector requires social engineering to convince users to interact with malicious content, making it a client-side exploitation scenario that leverages user trust. The vulnerability operates at the browser's user interface level where password managers interact with web content, creating a potential pathway for data exfiltration between different security domains.
From an operational impact perspective, this vulnerability presents a low severity threat but still represents a significant privacy concern for users who may inadvertently engage with malicious content. The attack requires user interaction, which provides a natural defense mechanism, but demonstrates the inherent risks of browser-based password managers in cross-origin contexts. The vulnerability specifically targets the interaction between user interface gestures and password handling, suggesting that the browser's security model may not adequately separate different origins during password-related operations.
The exploitation scenario involves crafting HTML content that triggers specific UI behaviors when users interact with it, potentially allowing data leakage between different web origins. This type of vulnerability highlights the complexity of modern browser security models where password managers must balance usability with security boundaries. The fix implemented in Chrome 149.0.7827.53 likely involved strengthening the cross-origin isolation mechanisms in password handling components and ensuring proper validation of user interactions before allowing data access operations.
Security practitioners should consider this vulnerability in the context of broader browser security frameworks and ATT&CK technique T1531 which covers credential access through password managers. The vulnerability demonstrates how seemingly benign user interface interactions can be weaponized when combined with improper access control implementation. Organizations should ensure their users maintain current browser versions and implement security awareness training to prevent social engineering attacks that might exploit such client-side vulnerabilities. The incident also underscores the importance of continuous security testing of browser components and the need for robust cross-origin security boundaries in modern web applications.