CVE-2026-17747 in Chrome
Summary
by MITRE • 07/30/2026
Insufficient validation of untrusted input in Payments in Google Chrome on Android prior to 151.0.7922.72 allowed a remote attacker who had compromised the renderer process 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 critical weakness in Google Chrome's input validation mechanisms specifically within the payments functionality on Android devices. The flaw stems from inadequate sanitization and validation of untrusted input data that flows through the browser's rendering engine, creating an avenue for malicious actors to manipulate user interface elements. The vulnerability exists in versions prior to 151.0.7922.72 and demonstrates how insufficient input validation can lead to severe security implications when combined with process compromise scenarios.
The technical implementation of this vulnerability allows a remote attacker who has already gained access to the renderer process to execute UI spoofing attacks through carefully crafted HTML pages. This represents a sophisticated attack vector that leverages the compromised process to manipulate the browser's user interface, potentially deceiving users into providing sensitive information or performing unintended actions. The renderer process compromise typically occurs through other attack vectors such as drive-by downloads or malicious websites that exploit memory corruption vulnerabilities.
The operational impact of this vulnerability extends beyond simple deception attacks as it undermines the fundamental trust model of web browsers and their payment systems. When attackers can spoof user interface elements, they can create convincing fake payment forms, authentication prompts, or transaction confirmations that appear legitimate to users. This capability significantly increases the potential for financial fraud, credential theft, and other malicious activities that rely on user trust in the browser interface. The medium severity classification reflects the specific conditions required for exploitation, including prior compromise of the renderer process.
This vulnerability aligns with CWE-20, which addresses "Improper Input Validation" and is related to ATT&CK technique T1059.007 for "Command and Scripting Interpreter: JavaScript" as well as T1546.003 for "T1546.003 - Event Triggered Execution: Windows Scripting Host Component." The attack chain typically begins with an initial compromise of the renderer process through memory corruption vulnerabilities, followed by exploitation of the input validation weakness to manipulate the user interface. Organizations should implement comprehensive patch management programs to address this vulnerability promptly and consider additional security measures such as browser hardening configurations.
Mitigation strategies should focus on immediate patch deployment across all affected Android devices running Chrome versions prior to 151.0.7922.72, while also implementing network-level monitoring to detect potential exploitation attempts. Browser security configurations should include enhanced sandboxing measures and input validation controls that prevent unauthorized manipulation of UI elements. Additionally, user education regarding suspicious browser behavior and transaction verification processes remains crucial in defending against such attacks. The vulnerability highlights the importance of defense-in-depth approaches where multiple security layers work together to protect against sophisticated attack scenarios involving process compromise and UI manipulation.