CVE-2026-113337 in Chrome
Summary
by MITRE • 10/21/2026
Memory corruption in Scroll in Google Chrome 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)
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Analysis
by VulDB Data Team • 10/21/2026
The vulnerability identified as a memory corruption issue within the scroll handling mechanisms of Google Chrome prior to version 156.0.8078.47 represents a significant risk vector for remote code execution attacks. This flaw resides in the browser's rendering engine, specifically affecting how the user interface manages scrolling operations on web pages. When an attacker crafts a malicious HTML page containing specially designed elements or scripts that trigger specific scroll events, they can exploit inconsistencies in memory management routines associated with these actions. The core technical failure involves improper handling of memory allocation and deallocation during complex layout recalculations triggered by scrolling interactions. This mismanagement leads to conditions such as use-after-free or buffer overflow scenarios where the browser accesses memory regions that have already been freed or are outside the intended boundaries, thereby corrupting the heap structure.
From a technical perspective, this vulnerability falls under the category of CWE-125 Out-of-bounds Read and potentially CWE-416 Use After Free, depending on the specific manifestation within the scroll logic. The attacker leverages these memory corruption states to gain control over critical data structures or function pointers within the browser process. By carefully crafting the payload, it is possible to achieve arbitrary code execution with a high degree of reliability. Although Chrome employs robust sandboxing mechanisms designed to isolate web content from system resources, this particular vulnerability allows an adversary to escape the confines of the renderer process and execute commands within the broader context or potentially break out entirely if other mitigations are bypassed. The Chromium security team has classified this issue with a medium severity rating, reflecting its potential for exploitation while acknowledging the existing defenses that may complicate direct attack scenarios.
The operational impact of successfully exploiting this vulnerability is severe, as it enables a remote attacker to execute arbitrary code on the victim's machine without any user interaction beyond visiting the malicious webpage. This aligns closely with ATT&CK technique T1203 Exploitation for Client Execution, where attackers utilize vulnerabilities in client software to run malware or establish persistence. The ability to bypass sandbox restrictions elevates the threat level significantly, as it can lead to full system compromise, data exfiltration, and installation of persistent backdoors. Users relying on Chrome for sensitive activities such as online banking, corporate communications, or accessing confidential documents are at heightened risk if they remain on versions prior to the specified patch release. The lack of a user interface prompt during exploitation makes detection difficult without advanced endpoint monitoring solutions that track unusual process behavior or memory access patterns.
Mitigation strategies primarily involve immediate software updates to ensure all instances of Google Chrome are upgraded to version 156.0.8078.47 or later, where the underlying memory management logic for scroll operations has been corrected and validated. Organizations should enforce automated update policies across their fleets to minimize exposure windows. Additionally, deploying browser isolation technologies or web filtering solutions can provide an additional layer of defense by preventing access to untrusted domains that might host such crafted pages. Security teams are advised to monitor network traffic for indicators of compromise associated with known exploit kits and to utilize endpoint detection and response tools configured to alert on anomalous memory allocation patterns consistent with heap corruption exploits. Regular vulnerability assessments and patch management cycles remain the most effective defense against this class of browser-based threats.