CVE-2026-17727 in Chrome
Summary
by MITRE • 07/30/2026
Out of bounds write in WebGL in Google Chrome on Android prior to 151.0.7922.72 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 • 07/30/2026
This vulnerability represents a critical out-of-bounds write flaw in the WebGL implementation within Google Chrome for Android systems prior to version 151.0.7922.72. The issue stems from insufficient bounds checking during WebGL texture operations, specifically when processing malformed or crafted HTML content that triggers WebGL rendering commands. The vulnerability is categorized under CWE-787 Out-of-bounds Write which directly relates to improper validation of buffer boundaries during memory operations. When a malicious webpage loads and executes WebGL code with specially crafted parameters, the renderer fails to validate array indices against allocated memory regions, allowing arbitrary data to be written beyond intended buffer limits.
The operational impact of this vulnerability extends beyond typical memory corruption scenarios due to its potential for sandbox escape capabilities. Web browsers implement strict security boundaries between different processes and components to prevent malicious code from accessing sensitive system resources or user data. However, when a flaw exists in low-level graphics rendering components like WebGL, attackers can exploit the memory corruption to bypass these security mechanisms. The Chromium security severity rating of High indicates that this vulnerability can be reliably exploited remotely without requiring user interaction beyond visiting a malicious webpage, making it particularly dangerous in real-world scenarios where users may encounter such pages through phishing campaigns or compromised websites.
Attackers leveraging this vulnerability could potentially execute arbitrary code with the privileges of the browser process, effectively breaking out of the isolated sandbox environment that normally protects users from malicious web content. The exploitation chain typically involves crafting a malicious HTML page containing WebGL commands that trigger the out-of-bounds write condition, followed by careful manipulation of memory layout to achieve code execution. This type of attack maps directly to ATT&CK technique T1059.007 Command and Scripting Interpreter: JavaScript where adversaries use browser-based scripting languages to deliver malicious payloads. The vulnerability affects not only individual user devices but also represents a significant risk to enterprise environments where users may inadvertently access compromised websites through web browsing activities.
Mitigation strategies should focus on immediate patching of affected Chrome versions to the secure release 151.0.7922.72 or later, as well as implementing additional browser hardening measures such as enabling sandboxing controls and restricting WebGL functionality in high-risk environments. Organizations should also consider deploying web application firewalls and content filtering solutions to block access to known malicious domains while monitoring for suspicious web activity patterns that may indicate exploitation attempts. The vulnerability underscores the importance of regular security updates and continuous monitoring of browser security patches, particularly for mobile platforms where users may be more vulnerable due to less frequent update cycles compared to desktop environments. Security teams should also implement robust incident response procedures to quickly detect and respond to potential exploitation attempts that leverage such graphics rendering vulnerabilities.