CVE-2026-87488 in Chrome
Summary
by MITRE • 09/09/2026
Use after free in WebGL in Google Chrome on on Android prior to 153.0.8010.36 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Critical)
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Analysis
by VulDB Data Team • 09/09/2026
The vulnerability identified as a use-after-free condition within the WebGL subsystem of Google Chrome on Android represents a critical memory safety flaw that undermines the browser's core isolation mechanisms. This specific defect occurs when the application continues to reference a pointer to a memory block after that block has been freed, leading to undefined behavior during execution. In the context of Chromium-based browsers, such errors are particularly dangerous because they can be triggered by maliciously crafted web content accessed via standard HTTP or HTTPS protocols. The severity is classified as critical due to the potential for arbitrary code execution outside the browser's sandbox environment, which serves as the primary defense against remote attacks.
From a technical perspective, WebGL relies heavily on efficient memory management to handle complex graphics operations and shader programs. When an object associated with a WebGL context or resource is deallocated but remains accessible through lingering references held by other parts of the rendering pipeline, subsequent operations may read from or write to invalid memory addresses. An attacker can exploit this race condition or logical error by constructing an HTML page that manipulates these internal structures in a precise sequence. By carefully controlling the timing and content of WebGL commands, the adversary can achieve arbitrary read and write primitives, which are essential building blocks for more sophisticated exploitation techniques such as heap spraying or control flow hijacking.
The operational impact of this vulnerability is severe because it allows a remote attacker to bypass the sandbox restrictions that typically limit the damage an exploited browser process can inflict on the underlying operating system. Once code execution is achieved outside the sandbox, the attacker gains the ability to install malware, exfiltrate sensitive user data, or pivot further into the local network. This compromises not only the confidentiality and integrity of the user's browsing session but also the security posture of the Android device itself. The attack vector remains remote and requires no special privileges from the victim other than visiting a malicious webpage, making it highly scalable in phishing campaigns or drive-by download scenarios.
Industry standards classify this type of flaw under CWE-416, which denotes Use After Free vulnerabilities. These are consistently ranked among the most prevalent and dangerous software defects due to their direct link to memory corruption and potential for remote code execution. In terms of adversary tactics, this exploitation aligns with MITRE ATT&CK techniques related to initial access through browser exploits and subsequent privilege escalation or defense evasion by escaping sandbox boundaries. Security researchers emphasize that such vulnerabilities often stem from complex interactions between JavaScript engines and native C++ components within the Chromium architecture, highlighting the difficulty in maintaining memory safety across these layers without rigorous static analysis and fuzzing.
Mitigation strategies primarily involve applying the latest security patches provided by Google for Chrome on Android version 153.0.8010.36 or later. These updates include fixes to the WebGL implementation that ensure proper lifecycle management of graphics resources, preventing dangling pointers from being dereferenced after deallocation. Organizations and individual users should prioritize automatic update mechanisms to minimize exposure windows. Additionally, employing browser hardening techniques such as disabling unnecessary plugins, using strict content security policies where applicable, and leveraging sandboxing extensions can provide additional layers of defense against similar exploitation attempts in the interim before updates are deployed across all endpoints.