CVE-2026-15771
Summary
by MITRE • 07/14/2026
Insufficient validation of untrusted input in Media in Google Chrome on Windows prior to 150.0.7871.125 allowed a remote attacker who had compromised the renderer process to obtain potentially sensitive information from process memory via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 07/14/2026
This vulnerability represents a critical security flaw in Google Chrome's handling of media content on Windows systems, affecting versions prior to 150.0.7871.125. The issue stems from inadequate validation of untrusted input within the media processing components, creating a potential information disclosure channel that could be exploited by attackers who have already compromised the renderer process. The vulnerability falls under the category of insufficient input validation, which is classified as CWE-20 by the Common Weakness Enumeration framework and aligns with ATT&CK technique T1059.007 for input validation flaws.
The technical implementation of this vulnerability occurs when Chrome processes media content through its renderer component, where untrusted HTML pages can contain crafted malicious elements that bypass normal input sanitization mechanisms. When a compromised renderer process encounters such malicious media content, the insufficient validation allows attackers to extract potentially sensitive information from the process memory space. This type of vulnerability is particularly dangerous because it operates within the trusted execution environment of the browser, leveraging the existing compromise to escalate information disclosure capabilities.
The operational impact of this vulnerability extends beyond simple data exposure, as it provides attackers with access to process memory that may contain session tokens, user credentials, or other sensitive data structures. Attackers who have already achieved renderer process compromise can use this flaw to extract additional sensitive information from memory, potentially leading to further exploitation such as credential theft or privilege escalation. The high severity classification by Chromium security teams reflects the potential for significant data loss and system compromise when exploited in conjunction with existing renderer compromises.
Mitigation strategies should focus on immediate patching of Chrome installations to version 150.0.7871.125 or later, which includes the necessary input validation improvements. Organizations should also implement additional network monitoring to detect suspicious memory access patterns and consider deploying browser hardening measures such as sandboxing enhancements and strict content security policies. The vulnerability highlights the importance of robust input validation in media processing components and demonstrates how seemingly isolated flaws can compound when attackers have achieved initial access through other vectors, emphasizing the need for comprehensive security controls throughout the application lifecycle.