CVE-2026-87596 in Chrome
Summary
by MITRE • 09/09/2026
Out of bounds read in ANGLE in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to read memory outside the sandbox via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 09/09/2026
The vulnerability identified as an out-of-bounds read within the ANGLE graphics library in Google Chrome prior to version 153.0.8010.36 represents a significant memory safety flaw that undermines the browser's sandboxing mechanisms. ANGLE, which stands for Almost Native Graphics Layer Engine, serves as a critical translation layer between web applications and underlying hardware-accelerated graphics APIs such as OpenGL, Vulkan, or Direct3D. This component is responsible for interpreting WebGL commands issued by JavaScript code running in web pages and converting them into native API calls that the GPU can execute efficiently. When an attacker crafts a malicious HTML page containing specifically designed WebGL shaders or draw calls, they can trigger logic errors within ANGLE's processing pipeline. These errors result in the application attempting to access memory locations beyond the bounds of allocated buffers. Because this operation occurs during graphics rendering operations, it allows for arbitrary read accesses into adjacent memory regions that are typically protected by the browser's sandbox boundaries.
From a technical perspective, this flaw is classified under CWE-125, which denotes Out-of-bounds Read vulnerabilities. The core issue lies in insufficient validation of buffer indices or sizes before performing memory access operations within the graphics processing unit context. In modern web browsers, security relies heavily on process isolation and sandboxing to prevent malicious code from accessing sensitive system resources or user data. However, when a vulnerability allows reading outside these allocated bounds, it effectively bypasses part of this protection model. The attacker does not need direct shell access or privilege escalation exploits; instead, they leverage the browser's own rendering engine as an attack vector. By embedding the exploit in a standard HTML page hosted on a malicious website, the threat actor can trigger the vulnerability simply by having a victim visit the site and load the content. This remote code execution potential is particularly dangerous because it requires no user interaction beyond visiting the webpage, making it suitable for drive-by download attacks or targeted spear-phishing campaigns where social engineering has already lowered defenses.
The operational impact of this vulnerability extends beyond simple data leakage. While an out-of-bounds read primarily allows information disclosure, such as reading sensitive cookies, session tokens, or internal browser structures, it can often serve as a precursor to more severe exploits like arbitrary code execution. Attackers may use the leaked memory contents to bypass Address Space Layout Randomization (ASLR) by discovering base addresses of critical libraries or modules. This knowledge significantly reduces the complexity required for subsequent exploitation stages. Furthermore, because ANGLE operates at a low level close to hardware interaction, errors here can have cascading effects on system stability and security posture. The Chromium project has classified this issue with high severity due to its potential to compromise user privacy and integrity across multiple platforms supported by Chrome, including Windows, macOS, Linux, Android, and iOS.
To mitigate the risks associated with this vulnerability, users must ensure that their Google Chrome installation is updated to version 153.0.8010.36 or later. This update contains patches that enforce stricter bounds checking within ANGLE's graphics processing routines, preventing unauthorized memory access attempts. Organizations should implement automated patch management systems to deploy these updates rapidly across all endpoints. Additionally, security teams can employ browser hardening techniques such as disabling JavaScript in untrusted sites using enterprise policies or leveraging content security policies to restrict the execution of potentially malicious scripts. Monitoring for anomalous network traffic originating from browsers may also help detect exploitation attempts in real-time. It is crucial to recognize that while technical mitigations are effective, user awareness remains a vital layer of defense against social engineering tactics used to deliver such crafted web pages.
In terms of industry standards and threat modeling frameworks, this vulnerability aligns with MITRE ATT&CK technique T1203, which covers Exploitation for Client Execution. The attack vector leverages the client-side execution environment of a widely deployed application to achieve initial access or information gathering. Security analysts should treat such vulnerabilities as high-priority items in their threat intelligence feeds due to the widespread adoption of Chrome and the ease with which attackers can distribute malicious content via email, social media, or compromised websites. Regular vulnerability scanning and penetration testing that include browser-based attack simulations can help identify similar weaknesses before they are exploited in the wild. Maintaining up-to-date software is the most effective defense against these types of memory corruption vulnerabilities, as developers continuously refine their security models to address emerging threats in complex systems like web browsers.