CVE-2026-106227 in Chrome
Summary
by MITRE • 10/06/2026
Use after free in Core in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as a use-after-free condition within the core components of Google Chrome prior to version 155.0.8059.39 represents a critical memory management flaw that compromises the integrity and confidentiality of user data. This specific class of vulnerabilities arises when software continues to use a pointer after it has been freed, leading to undefined behavior that can be exploited by malicious actors. In this instance, the defect resides in the browser's core processing logic, which handles various web content rendering tasks. The severity is classified as high due to the potential for remote code execution without user interaction beyond visiting a crafted webpage.
The technical mechanism behind this exploit involves an attacker creating a specially designed HTML page that triggers the premature deallocation of memory objects while references to those objects are still active within the browser's runtime environment. When the browser attempts to access these dangling pointers, it may interpret arbitrary data as executable code or manipulate internal structures in unintended ways. This scenario allows for heap corruption, which can be leveraged to achieve control over program execution flow. The attacker crafts a malicious webpage containing specific JavaScript and HTML elements that exploit this timing window between memory release and subsequent use, thereby gaining the ability to execute commands within the context of the browser process.
The operational impact of this vulnerability is severe because it facilitates remote code execution outside the sandbox boundaries that typically isolate web content from the underlying operating system. Modern browsers employ a multi-process architecture with strict sandboxes to limit the damage caused by compromised tabs or extensions. However, if an attacker successfully exploits a use-after-free in the core components, they may bypass these security controls and execute arbitrary code on the victim's machine. This could lead to full system compromise, including installation of malware, theft of sensitive information such as credentials and financial data, and establishment of persistent backdoors for future attacks.
This vulnerability aligns with Common Weakness Enumeration identifier CWE-416, which describes use after free errors resulting from improper memory management practices. From a threat intelligence perspective, the exploitation technique corresponds to ATT&CK tactics involving initial access through spearphishing links or drive-by downloads, followed by execution and potential privilege escalation techniques aimed at escaping browser sandboxes. The ability to execute code outside the sandbox significantly elevates the risk profile, as it undermines one of the primary defense-in-depth strategies employed by modern web browsers.
Mitigation for this vulnerability requires immediate updating to Google Chrome version 155.0.8059.39 or later, where the underlying memory management logic has been corrected to prevent dangling pointer access. Organizations should enforce automated patching policies to ensure all endpoints are running secure versions of the browser. Additionally, users can reduce exposure by enabling click-to-play for plugins and avoiding interaction with untrusted web content until patches are applied. Security teams should monitor for indicators of compromise associated with drive-by download campaigns targeting this specific vulnerability class and consider deploying endpoint detection solutions capable of identifying anomalous memory access patterns indicative of heap exploitation attempts.