CVE-2026-19171 in Chrome
Summary
by MITRE • 08/07/2026
Use after free in Media in Google Chrome on Windows prior to 151.0.7922.109 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 08/07/2026
This vulnerability represents a critical use-after-free condition in the media handling components of Google Chrome on Windows systems, specifically affecting versions prior to 151.0.7922.109. The flaw occurs within the browser's media processing pipeline where improper memory management allows an attacker to manipulate freed memory regions through maliciously crafted HTML content. This type of vulnerability falls under CWE-416, which specifically addresses use-after-free errors that occur when a program continues to reference memory after it has been freed, creating potential exploitation opportunities for remote attackers.
The technical execution of this vulnerability involves an attacker constructing a specially crafted HTML page containing malicious media elements or JavaScript code that triggers the flawed memory management scenario. When Chrome processes such content, the media handling subsystem allocates and subsequently frees memory structures while other code paths attempt to reference these already-released resources. This creates a race condition or memory corruption scenario that can be leveraged to execute arbitrary code with the privileges of the Chrome process. The vulnerability is particularly dangerous because it operates within the browser's sandboxed environment, yet provides a potential pathway for sandbox escape attacks.
The operational impact of this vulnerability extends beyond simple remote code execution as it represents a significant escalation vector within the browser security model. Attackers can exploit this flaw to bypass the operating system's security boundaries that normally protect against malicious code execution. The Chromium security severity rating of High indicates the substantial risk this vulnerability poses, particularly given Chrome's widespread adoption and the relative ease with which an attacker can deliver such payloads through web-based attacks. This vulnerability aligns with ATT&CK technique T1059.007 for script-based exploitation and T1068 for local privilege escalation through memory corruption.
Mitigation strategies for this vulnerability require immediate patching of Chrome installations to version 151.0.7922.109 or later, as provided by Google's security updates. Organizations should implement network-level controls such as web application firewalls and content filtering systems to block suspicious HTML content that might trigger this vulnerability. Browser hardening measures including enabling sandboxing features, disabling unnecessary media plugins, and implementing strict content security policies can further reduce the attack surface. Additionally, security monitoring solutions should be configured to detect anomalous memory access patterns or process behavior that might indicate exploitation attempts. The vulnerability demonstrates the critical importance of maintaining up-to-date browser installations as part of comprehensive cybersecurity defense strategies, particularly in enterprise environments where a single compromised browser instance could lead to broader network infiltration.