CVE-2026-113007 in Chrome
Summary
by MITRE • 10/21/2026
Memory corruption in Permissions in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 10/21/2026
The vulnerability identified as a memory corruption issue within the permissions subsystem of Google Chrome prior to version 156.0.8078.47 represents a significant breach in browser isolation mechanisms. This flaw stems from improper handling of permission states during web page interactions, specifically when processing crafted HTML content that triggers specific code paths related to resource access controls. The root cause lies in the failure to correctly validate or manage memory allocations associated with permission checks, leading to conditions such as use-after-free or buffer overflow scenarios within the browser's core processes. Such errors are particularly dangerous because they occur in high-privilege contexts relative to web content, allowing an attacker to manipulate internal data structures that govern sandbox boundaries.
From a technical perspective, this vulnerability falls under the category of CWE-120 Buffer Copy without Checking Size of Input and potentially CWE-416 Use After Free, depending on the specific memory management failure observed in the permissions module. The Chromium security team classified this issue with medium severity, indicating that while exploitation requires careful crafting of input to trigger the precise race condition or memory state error, it is feasible for a determined attacker. The flaw allows code execution outside the sandbox, which effectively neutralizes one of Chrome's primary defense-in-depth strategies. By escaping the sandbox, an attacker gains access to system resources and APIs that are normally restricted from web content, thereby escalating privileges from untrusted user-level context to potentially higher levels within the operating system environment where the browser is running.
The operational impact of this vulnerability is severe for end-users who visit maliciously crafted websites or click on links containing specially designed HTML payloads. An attacker can leverage this flaw to execute arbitrary code with the same permissions as the victim, leading to full compromise of the user's machine if additional exploitation steps are successful. This could result in data theft, installation of persistent malware, or use of the compromised system for further attacks against other networked resources. The ability to bypass sandbox restrictions means that traditional web-based defenses such as Content Security Policy may be rendered ineffective once arbitrary code execution is achieved outside the controlled environment.
Mitigation strategies primarily involve updating Google Chrome to version 156.0.8078.47 or later, where these memory management issues in the permissions subsystem have been addressed through rigorous code review and patching of the underlying vulnerabilities. Users should ensure automatic updates are enabled to receive security patches promptly as they become available. Additionally, employing browser hardening techniques such as disabling unnecessary plugins, using strict content policies, and avoiding interaction with untrusted web sources can reduce the attack surface. Security teams should also monitor for indicators of compromise related to sandbox escape attempts and consider deploying endpoint detection and response solutions that can identify anomalous behavior resulting from potential exploitation of this vulnerability. This incident underscores the critical importance of maintaining up-to-date browser software to protect against sophisticated remote code execution attacks targeting core security features like sandboxing.