CVE-2026-17671 in Chrome
Summary
by MITRE • 07/30/2026
Insufficient validation of untrusted input in ANGLE in Google Chrome prior to 151.0.7922.72 allowed a remote attacker who had compromised the renderer process 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
The vulnerability under discussion represents a critical sandbox escape flaw in ANGLE, the DirectX graphics library component integrated into Google Chrome browsers. This issue existed in versions prior to 151.0.7922.72 and constitutes a high-severity security concern that could be exploited by remote attackers who have already compromised the renderer process. The fundamental problem lies in insufficient validation of untrusted input flowing through ANGLE's processing pipeline, creating a pathway for privilege escalation beyond the intended browser sandbox boundaries.
The technical flaw manifests as a failure to properly validate graphics-related data when processing HTML content through the ANGLE rendering engine. When a malicious webpage attempts to exploit this vulnerability, it can craft specific graphics commands or parameters that bypass input sanitization checks within ANGLE. This validation gap allows untrusted data to flow directly into sensitive system operations, potentially enabling an attacker with renderer process access to execute arbitrary code outside the restricted browser environment. The vulnerability specifically targets the graphics subsystem's handling of user-supplied content, leveraging the complex nature of graphics processing to circumvent security boundaries.
From an operational impact perspective, this vulnerability presents a severe risk to browser security models since it allows attackers who have already achieved renderer process compromise to escalate their privileges further. The sandbox escape capability means that what might otherwise remain a limited renderer-based attack can potentially expand to full system compromise, bypassing Chrome's multi-process architecture and security isolation mechanisms. This represents a particularly dangerous scenario in environments where attackers may have already obtained initial access through other means, as this vulnerability provides a path to complete system takeover without requiring additional exploitation vectors.
The vulnerability maps directly to CWE-20, which describes "Improper Input Validation" as a fundamental weakness in software design that allows malicious data to bypass validation checks. From an ATT&CK framework perspective, this represents a sandbox evasion technique under T1497.002 for Virtualization/Sandbox Evasion and potentially T1068 for Exploitation for Privilege Escalation. Organizations should implement immediate mitigation strategies including updating to Chrome version 151.0.7922.72 or later, deploying additional monitoring for anomalous graphics processing activities, and maintaining strict process isolation policies within their browser security frameworks.
Security teams should also consider implementing network-level controls to detect and block suspicious HTML content that might trigger ANGLE processing anomalies, while maintaining comprehensive logging of graphics-related system calls for threat detection purposes. The vulnerability highlights the importance of validating all inputs at multiple layers of the application stack, particularly in complex components like graphics libraries that handle untrusted data from web content sources. Regular security assessments focusing on graphics processing pipelines and input validation mechanisms can help identify similar vulnerabilities before they can be exploited in the wild.