CVE-2026-19137 in Chrome
Summary
by MITRE • 08/07/2026
Use after free in WebGL in Google Chrome on Android prior to 151.0.7922.109 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)
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Analysis
by VulDB Data Team • 08/07/2026
This vulnerability represents a critical use-after-free condition in the WebGL implementation within Google Chrome on Android platforms, specifically affecting versions prior to 151.0.7922.109. The flaw exists within the renderer process of the browser, where improper memory management allows an attacker who has already compromised this isolated process to potentially execute arbitrary code with elevated privileges. The vulnerability manifests when the WebGL graphics API handles certain crafted HTML elements that trigger memory deallocation followed by subsequent access to freed memory locations, creating a classic use-after-free scenario that can be exploited for privilege escalation.
The technical nature of this vulnerability aligns with CWE-416, which describes the use of freed memory condition where program code attempts to access memory that has already been freed. In the context of browser security, this particular flaw operates at the intersection of graphics processing and process isolation mechanisms, where the renderer process is designed to be a sandboxed environment separate from the main browser process. However, when an attacker can manipulate WebGL operations to cause memory corruption in this isolated space, they may be able to craft a payload that escapes the sandbox boundaries.
From an operational perspective, the impact of this vulnerability extends beyond typical web-based attacks as it specifically targets the renderer process which serves as a crucial security boundary in modern browser architectures. The attack vector requires an initial compromise of the renderer process, which represents a significant security achievement for attackers who have already bypassed other protections. This scenario aligns with ATT&CK technique T1059.007 for command and scripting interpreter, where the attacker would leverage the compromised environment to execute malicious code that exploits the memory corruption vulnerability.
The exploitation chain typically begins with an attacker compromising the renderer process through a separate initial vulnerability or attack vector, then leveraging the use-after-free condition in WebGL to gain additional privileges within the sandboxed environment. This could potentially allow for full system compromise if successful, as the attack could enable the execution of arbitrary code with the same privileges as the renderer process, which may have access to sensitive system resources and data.
Mitigation strategies for this vulnerability require immediate patching of affected Chrome versions to 151.0.7922.109 or later, which includes memory safety improvements and proper handling of WebGL object lifecycles. Organizations should also implement layered security measures including web application firewalls, content security policies, and regular security assessments of browser configurations. Additionally, maintaining awareness of the ATT&CK framework's recommendations for preventing process isolation bypasses and implementing proper privilege separation mechanisms can help reduce the risk surface when such vulnerabilities are present in browser environments.
Security researchers should monitor for related vulnerabilities in graphics APIs and renderer components, as use-after-free conditions often indicate broader memory management issues that may affect other parts of the browser or operating system. The vulnerability also underscores the importance of regular security updates and the need for comprehensive testing of graphics processing components in web browsers to prevent exploitation through seemingly isolated subsystems like WebGL implementations.