CVE-2026-113031 in Chrome
Summary
by MITRE • 10/21/2026
Memory corruption in Media in Google Chrome on on Windows prior to 156.0.8078.47 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 10/21/2026
The vulnerability described constitutes a critical memory corruption flaw within the media processing subsystem of Google Chrome on Windows operating systems prior to version 156.0.8078.47. This defect allows for arbitrary code execution, which represents one of the most severe categories of software vulnerabilities due to its potential to grant attackers complete control over the affected system. The root cause lies in improper handling of memory operations within the media components, likely involving issues such as use-after-free conditions or buffer overflow errors that occur when processing specific types of multimedia content embedded in web pages. These flaws are particularly dangerous because they reside in a component responsible for decoding and rendering audio and video data, which is frequently accessed by modern web applications through standard HTML elements like the video tag.
The operational impact of this vulnerability is significant due to its remote exploitability vector. An attacker can craft a malicious HTML page containing specially designed media files or scripts that trigger the memory corruption flaw when rendered by the browser engine. When an unsuspecting user visits this crafted webpage, the malformed data causes the Chrome process to write to unintended memory locations or execute invalid pointers. Although Google Chrome employs sandboxing mechanisms to isolate web content from the rest of the operating system and limit the damage a compromised renderer can cause, successful exploitation in this context implies that the attacker managed to escape these security boundaries. This escalation allows the execution of arbitrary code with the privileges of the user running the browser, potentially leading to full system compromise if additional privilege escalation techniques are employed post-exploitation.
From a classification perspective, this vulnerability aligns closely with CWE-120 Buffer Copy without Checking Size of Input and CWE-416 Use After Free, which are common sources of memory corruption in complex software like Chromium-based browsers. The attack vector is categorized under ATT&CK technique T1189 Drive-by Compromise, where the initial access is gained through a website that hosts malicious content designed to exploit client-side vulnerabilities. Furthermore, the ability to execute arbitrary code places this incident within the scope of ATT&CK tactic TA0002 Execution and potentially TA0005 Defense Evasion if techniques are used to bypass security controls during exploitation. The medium severity rating assigned by Chromium reflects the complexity required to reliably trigger the flaw in a sandboxed environment, but does not diminish its potential for widespread impact given the ubiquity of Chrome as a web browser.
Mitigation strategies primarily involve immediate patching and proactive defense measures. Users must update Google Chrome to version 156.0.8078.47 or later, which contains the necessary code fixes to address the memory handling errors in the media subsystem. Organizations should enforce automated update policies to ensure all endpoints are protected against known vulnerabilities promptly. Additionally, implementing application whitelisting and restricting user privileges can reduce the impact of successful exploits by limiting the ability of arbitrary code to perform system-level changes. Security teams should also monitor for indicators of compromise associated with drive-by download campaigns targeting browser vulnerabilities, such as unusual network connections from Chrome processes or attempts to spawn new executable files from temporary directories where browsers typically store cached media data.