CVE-2026-79227 in Chrome
Summary
by MITRE • 08/26/2026
Type confusion in DevTools in Google Chrome prior to 152.0.7977.65 allowed a remote attacker leveraging social engineering to execute arbitrary code inside 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 a type confusion issue within the DevTools component of Google Chrome prior to version 152.0.7977.65 represents a significant memory safety flaw that undermines the browser's sandboxing mechanisms. Type confusions occur when an application incorrectly interprets the data type of a variable or object, leading to operations being performed on data in ways unintended by the programmer. In this specific instance, the flaw resides within the DevTools interface, which is typically used for debugging and development purposes but can be accessed via crafted web content under certain conditions. The core technical failure involves the mishandling of memory structures where an object expected to be of one type is treated as another, allowing an attacker to manipulate internal state in ways that bypass standard security checks. This misinterpretation enables the execution of arbitrary code within a context that should otherwise be restricted by Chrome's multi-process architecture and sandboxing policies designed to isolate untrusted web content from the host operating system.
From an operational perspective, this vulnerability allows for remote code execution through social engineering tactics rather than requiring direct exploitation of a server-side service. An attacker would need to lure a victim into visiting a specially crafted HTML page that triggers the type confusion within the DevTools subsystem. Once triggered, the malformed data causes Chrome to execute instructions at arbitrary memory addresses or with elevated privileges relative to the sandboxed environment. The Chromium security team has classified this issue as Medium severity, indicating that while it is serious enough to warrant an immediate patch, it may require specific conditions or user interaction to achieve full exploitation compared to critical zero-day vulnerabilities that allow silent remote code execution without any user engagement.
The impact of successfully exploiting this type confusion extends beyond simple data corruption; it facilitates a complete compromise of the browser's security boundary. By executing arbitrary code inside the sandbox, an attacker can potentially access sensitive information stored locally by the browser, such as cookies, session tokens, and saved passwords. Furthermore, depending on the specific implementation details not fully disclosed in the summary, this could serve as a stepping stone for escaping the sandbox entirely to gain control over the underlying operating system. This aligns with common attack patterns observed in modern web-based exploits where memory corruption bugs are leveraged to achieve arbitrary code execution, often followed by privilege escalation techniques to break out of restricted environments.
To mitigate the risks associated with this vulnerability, users and organizations must ensure that Google Chrome is updated to version 152.0.7977.65 or later immediately upon availability. Since the exploitation vector involves social engineering via crafted HTML pages, maintaining up-to-date browser versions remains the most effective defense against such memory safety issues. Additionally, security awareness training can help reduce the success rate of social engineering attacks by educating users about the risks of visiting untrusted websites or interacting with suspicious content that may attempt to trigger developer tools or debugging interfaces unexpectedly. From a defensive monitoring standpoint, detecting attempts to load malicious scripts into DevTools contexts or unusual memory access patterns in Chrome processes could provide early warning indicators for such exploitation attempts.
This vulnerability maps directly to CWE-843, which describes Accessing Memory with Incorrectly Updated Pointer Reference, and more broadly to the class of type confusion errors that are prevalent in C++ based applications like Chromium. In terms of offensive security frameworks, this exploit path aligns with MITRE ATT&CK technique T1059, Command and Scripting Interpreter, as it allows an attacker to execute arbitrary code on a victim's machine via web-based delivery mechanisms. The reliance on social engineering also connects to the initial access tactics described in the framework, highlighting the importance of both technical controls like patch management and human-centric defenses against phishing campaigns that might distribute such malicious HTML payloads.