CVE-2026-113049 in Chrome
Summary
by MITRE • 10/21/2026
Memory corruption in Core in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially execute arbitrary code inside 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 described involves a critical memory corruption flaw within the Core component of Google Chrome, specifically affecting versions prior to 156.0.8078.47. This defect represents a significant security risk as it allows for remote code execution through standard web browsing activities. The issue is classified with a medium severity rating by Chromium developers, indicating that while exploitation requires specific conditions or user interaction, the potential impact on system integrity and confidentiality is substantial. Memory corruption vulnerabilities are among the most dangerous classes of software defects because they can lead to arbitrary code execution, privilege escalation, and complete compromise of the host machine if not properly contained within security boundaries such as sandboxing mechanisms.
The technical nature of this flaw centers on improper memory management within Chrome's core processing engine. When a user visits a maliciously crafted HTML page, the browser attempts to parse and render the content. During this process, the application fails to correctly validate or manage memory allocations and deallocations associated with specific data structures or object states. This failure results in conditions such as use-after-free, buffer overflow, or heap corruption. These errors occur when the program accesses memory that has already been freed or writes beyond the boundaries of allocated buffers. In the context of a web browser, these operations often happen within JavaScript engines or rendering pipelines where dynamic memory usage is frequent and complex. The crafted HTML page serves as the attack vector, containing malicious scripts or malformed content designed to trigger this specific memory handling error during execution.
The operational impact of successfully exploiting this vulnerability extends beyond simple data leakage. An attacker who can exploit this flaw gains the ability to execute arbitrary code within the context of the browser process. Although modern browsers employ sandboxing techniques to restrict the permissions of renderer processes, a successful exploitation could potentially allow an attacker to escape these sandboxes or perform actions that compromise user privacy and system stability. This includes stealing sensitive information such as cookies, session tokens, and saved passwords, injecting malicious content into web pages, or using the compromised browser instance as a pivot point for further attacks against other systems on the network. The ability to execute code remotely means that no physical access or prior authentication is required; merely visiting a targeted URL can trigger the exploit if the user's browser version is outdated and lacks the necessary patches.
To mitigate this risk, immediate action must be taken by updating Google Chrome to version 156.0.8078.47 or later. This update contains specific code changes that address the memory management errors identified in the Core component. Organizations should enforce automated patching policies for all endpoints running affected versions of the browser to ensure rapid remediation across their infrastructure. Additionally, users and administrators can reduce exposure by disabling JavaScript execution on untrusted sites using enterprise policy configurations or by utilizing secure browsing features that block known malicious content before it is fully rendered. Regular security audits and vulnerability scanning should be conducted to identify any remaining instances of outdated software within the environment.
From a classification perspective, this vulnerability aligns with Common Weakness Enumeration (CWE) identifiers such as CWE-120 Buffer Copy without Checking Size of Input or CWE-416 Use After Free, depending on the specific memory error mechanism involved in the Core component. In terms of tactical mapping within the MITRE ATT&CK framework, this exploit falls under Initial Access techniques involving Drive-by Compromise, where attackers use web-based content to deliver malware or exploits without direct user interaction beyond visiting a webpage. It also relates to Defense Evasion tactics if the attacker uses memory corruption techniques to bypass security software detection mechanisms. Understanding these classifications helps in developing more robust defense strategies and monitoring rules tailored to detect similar exploitation attempts in real-time network traffic logs.