CVE-2026-79127 in Chrome
Summary
by MITRE • 08/26/2026
Out of bounds write in ANGLE in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 08/26/2026
The vulnerability identified as an out-of-bounds write within the ANGLE graphics library in Google Chrome prior to version 152.0.7977.65 represents a critical memory corruption flaw that undermines the browser's sandboxing mechanisms. ANGLE, which serves as the translation layer between web applications and native GPU drivers by converting OpenGL ES calls into DirectX or Vulkan commands, is deeply integrated into the rendering pipeline of Chromium-based browsers. When this library processes malformed input from a crafted HTML page containing malicious JavaScript or WebGL content, it fails to properly validate memory access boundaries during graphics command execution. This lack of rigorous bounds checking allows an attacker to write data beyond the allocated buffer limits, leading to heap corruption and potentially overwriting adjacent memory structures that control program flow or security metadata.
From a technical perspective, this flaw is classified under CWE-787: Out-of-bounds Write, which describes situations where software writes data past the end of a buffer. In the context of browser exploitation, such vulnerabilities are particularly dangerous because they can be triggered remotely through standard web browsing activities without requiring user interaction beyond visiting a malicious site. The attacker crafts an HTML page that leverages specific WebGL operations or shader programs to trigger the invalid memory write within ANGLE. By carefully controlling the size and content of the input data, the adversary can manipulate the heap layout to achieve arbitrary code execution. This capability effectively bypasses Chrome's sandboxing protections, which are designed to isolate web content from the underlying operating system. Once the sandbox is breached, the malicious payload gains elevated privileges on the victim's machine, allowing for full system compromise including installation of malware, data exfiltration, and lateral movement within a network environment.
The operational impact of this vulnerability extends beyond immediate code execution to include significant risks to user privacy and system integrity. An attacker leveraging this flaw can establish persistent access to the target device, monitor browsing activity, steal sensitive credentials stored in the browser, or use the compromised machine as part of a botnet for distributed denial-of-service attacks. The medium severity rating assigned by Chromium security reflects the complexity involved in reliably exploiting the vulnerability due to modern exploit mitigation techniques such as Address Space Layout Randomization (ASLR) and Data Execution Prevention (DEP). However, with sufficient effort and potentially additional helper vulnerabilities, these mitigations can be bypassed, making this a high-risk issue for organizations relying on Chrome for secure web access.
To mitigate the risks associated with this vulnerability, it is imperative to update Google Chrome to version 152.0.7977.65 or later immediately. This patch includes fixes within the ANGLE library that enforce stricter bounds checking and improve memory safety during graphics processing operations. Organizations should implement automated patch management systems to ensure timely deployment of security updates across all endpoints. Additionally, deploying browser isolation technologies or web content filtering solutions can provide an additional layer of defense by preventing access to untrusted or potentially malicious websites before they are rendered in the local environment. Security teams should also monitor for indicators of compromise related to WebGL exploitation and anomalous memory usage patterns that may indicate active attempts to exploit this flaw. Aligning with ATT&CK techniques such as T1203: Exploitation for Client Execution, defenders must recognize that client-side vulnerabilities remain a primary vector for initial access in advanced persistent threat campaigns.