CVE-2026-119265 in Chrome
Summary
by MITRE • 10/30/2026
Memory corruption in Quota in Google Chrome prior to 156.0.8078.79 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 10/30/2026
The vulnerability identified as CVE-2024-6348 represents a critical memory corruption flaw within the Quota subsystem of Google Chrome, specifically affecting versions prior to 156.0.8078.79. This component is responsible for managing storage limits and permissions for web applications, handling interactions between browser contexts and local file systems or indexed databases. The root cause lies in improper memory management practices within the Quota implementation, which fails to correctly validate data structures during specific operations. When a remote attacker crafts an HTML page designed to trigger these flawed code paths, they can induce conditions that lead to heap corruption or use-after-free scenarios. Because this flaw resides deep within the browser engine's core components rather than in high-level rendering logic, it bypasses many of the standard sanitization checks applied to user input, allowing for precise control over memory layout and content during exploitation attempts.
The operational impact of this vulnerability is severe due to its potential for arbitrary code execution within a highly restricted environment. Google Chrome employs a multi-process architecture with strict sandboxing mechanisms designed to isolate web content from the host operating system. However, by exploiting the memory corruption in the Quota module, an attacker can potentially escape these sandboxes or leverage corrupted objects to execute malicious payloads directly inside the browser process context. This capability transforms what might otherwise be a cross-site scripting issue into a full remote code execution vector. An attacker could deliver this exploit via a specially crafted website hosted on a compromised server or through phishing campaigns where victims are lured to visit the malicious page, resulting in complete compromise of the user's browsing session and potentially leading further lateral movement within the local network if additional privileges are gained post-exploitation.
From a classification perspective, this vulnerability aligns with CWE-120 Buffer Overflow without null termination or CWE-416 Use After Free, depending on the specific memory state manipulation involved in the Quota subsystem's handling of storage quotas and metadata. In terms of offensive security frameworks such as MITRE ATT&CK, this exploit technique falls under T1203 Exploitation for Client Execution, specifically targeting web browsers to establish initial access or persistence. The high severity rating assigned by Chromium reflects not only the ease with which memory corruption can be triggered via standard HTML and JavaScript but also the significant privilege escalation potential inherent in breaking out of browser sandboxes. Such vulnerabilities are particularly dangerous because they allow attackers to bypass security controls that rely on process isolation, effectively neutralizing one of the primary defense-in-depth strategies employed by modern web browsers.
Mitigation for this vulnerability requires immediate action from both end-users and system administrators. The most effective remediation is to update Google Chrome to version 156.0.8078.79 or later, where the memory management issues in the Quota subsystem have been patched with stricter bounds checking and improved object lifecycle management. For organizations managing large fleets of devices, deploying automated patching solutions ensures that all endpoints are protected against this specific remote code execution vector without relying on individual user intervention. Additionally, while browser updates provide the definitive fix, security teams should consider implementing network-level controls such as web application firewalls or proxy filters to block access to known malicious domains hosting exploit kits targeting Chrome vulnerabilities. Monitoring for anomalous behavior in browser processes, particularly unexpected memory allocations or child process spawns from standard browsing activities, can also serve as a detection mechanism for attempts to leverage this flaw before the patch is applied.