CVE-2026-17691 in Chrome
Summary
by MITRE • 07/30/2026
Out of bounds write in ANGLE in Google Chrome on Windows 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 condition within ANGLE graphics library component of Google Chrome on Windows systems, prior to version 151.0.7922.72. The flaw occurs in the graphics processing subsystem that translates WebGL and Direct3D API calls into native graphics operations. When processing maliciously crafted HTML content containing specially constructed graphics commands, the ANGLE library fails to properly validate array bounds during buffer operations, leading to memory corruption that can be exploited by remote attackers. This issue falls under CWE-787 Out-of-bounds Write which is classified as a high severity vulnerability due to its potential for arbitrary code execution and privilege escalation.
The technical exploitation of this vulnerability enables attackers to manipulate memory layout within Chrome's rendering process through carefully crafted HTML documents that trigger malformed graphics operations. The ANGLE library's improper bounds checking allows an attacker to write data beyond allocated buffer boundaries, potentially overwriting adjacent memory regions including function pointers or control structures. This memory corruption can be leveraged to achieve sandbox escape from Chrome's isolated rendering context, effectively breaking down the security boundaries designed to protect users from malicious web content. The vulnerability specifically affects Windows platforms where ANGLE serves as the graphics library implementation for WebGL and Direct3D operations.
The operational impact of this vulnerability extends beyond simple remote code execution to encompass complete system compromise when successfully exploited. Attackers can leverage the sandbox escape to gain elevated privileges and potentially execute arbitrary commands on affected systems. The high severity classification stems from the fact that exploitation requires only a malicious webpage, making it particularly dangerous for users who browse the internet regularly. This vulnerability aligns with ATT&CK technique T1059 Command and Scripting Interpreter where attackers can execute code remotely through browser-based attacks, and T1068 Exploitation for Privilege Escalation when the sandbox escape succeeds.
Mitigation strategies should focus on immediate patch deployment to Chrome version 151.0.7922.72 or later, which includes fixes for the ANGLE buffer overflow conditions. Organizations should also implement additional security measures such as enabling Chrome's built-in sandboxing features, using content security policies to restrict embedded content, and deploying web application firewalls that can detect and block malicious graphics-related requests. Network administrators should consider implementing browser hardening configurations that disable unnecessary graphics APIs and limit WebGL capabilities in enterprise environments. The vulnerability demonstrates the importance of robust input validation and memory safety practices in graphics libraries, as highlighted by industry standards emphasizing proper bounds checking in graphics rendering components.