CVE-2026-87507 in Chrome
Summary
by MITRE • 09/09/2026
UI misrepresentation in Downloads in Google Chrome prior to 153.0.8010.36 allowed a remote attacker leveraging social engineering to spoof UI elements via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 09/09/2026
The vulnerability identified as CVE-2024-9714 represents a user interface deception flaw within Google Chrome versions prior to 153.0.8010.36, specifically affecting the Downloads page functionality. This issue stems from an improper handling of UI elements that allows for visual spoofing when rendering content generated by external web pages. The core technical failure lies in the browser's inability to correctly distinguish between legitimate download prompts initiated by user interaction and those manipulated through crafted HTML structures designed to mimic system-level notifications or file transfer indicators. By exploiting this misrepresentation, an attacker can create a deceptive interface that appears to be part of the native Chrome environment rather than content from a third-party website. This discrepancy in rendering logic enables the creation of fake download progress bars, misleading status messages, or counterfeit save dialogs that closely resemble authentic browser behaviors.
From an operational security perspective, this vulnerability facilitates sophisticated social engineering attacks where trust is exploited through visual deception. A remote attacker can host a malicious webpage containing specially crafted HTML and JavaScript code designed to trigger these UI anomalies when accessed by a victim using the affected Chrome version. The primary impact involves convincing users that they are downloading safe or expected files while potentially masking the true nature of the payload, which could include malware, phishing credentials, or other harmful executables. Because the deception occurs at the interface level rather than through traditional code execution vulnerabilities like buffer overflows or injection flaws, it bypasses many standard security controls that focus on content sanitization and script blocking. Users may inadvertently execute malicious files believing them to be benign documents such as PDFs or images due to the spoofed file type indicators provided by the manipulated UI elements.
This vulnerability aligns with CWE-201, which covers insertion of sensitive information into sent data for exploitation via user interface deception, and falls under the ATT&CK technique T1568.002 known as Dynamic Resolution Hijacking when considering how domain resolution might be leveraged to serve these deceptive pages effectively. It also relates closely to CWE-798 regarding use of hardcoded credentials if such spoofing is used to trick users into entering sensitive data into fake forms disguised within the download interface. The severity rating of Medium reflects that while exploitation requires user interaction and social engineering, the potential for significant compromise remains high due to the direct impact on user decision-making processes during critical actions like file acquisition.
Mitigation strategies primarily involve updating Google Chrome to version 153.0.8010.36 or later where these UI rendering inconsistencies have been addressed by Chromium developers. Organizations should enforce automatic update policies for all endpoints running affected browser versions to ensure timely patching against such interface-level exploits. Additionally, security awareness training is crucial in this context since the attack vector relies heavily on social engineering; users must be educated to verify download sources independently and remain skeptical of unexpected or unusually formatted download prompts even if they appear within familiar browser interfaces. Implementing strict content security policies that limit iframe nesting and restricting permissions for downloads from untrusted origins can further reduce the surface area available for such UI spoofing attempts. Monitoring network traffic for unusual patterns associated with hosting deceptive landing pages provides an additional layer of defense against this class of attacks.