CVE-2026-110149 in Chrome
Summary
by MITRE • 10/13/2026
Use after free in Browser in Google Chrome prior to 155.0.8059.79 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Critical)
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Analysis
by VulDB Data Team • 10/13/2026
The vulnerability identified as a use-after-free condition within the browser engine of Google Chrome prior to version 155.0.8059.79 represents a critical memory management flaw that undermines the integrity of the application's sandboxing mechanisms. This type of error occurs when a program continues to use a pointer after it has been freed, leading to undefined behavior that can be exploited by malicious actors. In this specific instance, the flaw resides within the core browser components responsible for parsing and rendering web content, which are typically isolated in low-privilege sandboxed processes to limit the impact of potential exploits. However, due to the nature of use-after-free vulnerabilities, an attacker who successfully triggers this condition can manipulate memory structures in a way that allows them to execute arbitrary code with higher privileges than intended by the browser's security model.
From a technical perspective, the exploitation vector involves a crafted HTML page designed to trigger specific JavaScript operations or DOM manipulations that cause the browser to free a memory object while retaining references to it elsewhere in the execution flow. When these stale pointers are subsequently dereferenced, they may point to attacker-controlled data rather than valid application state. This discrepancy enables an adversary to achieve arbitrary code execution outside the confines of the sandboxed renderer process. The ability to escape the browser's security boundary is particularly severe because it allows the malicious payload to interact directly with the underlying operating system and user environment without restriction, effectively bypassing multiple layers of defense designed to contain web-based threats.
The operational impact of this vulnerability is significant given its remote exploitability. Since the attack can be initiated simply by a victim visiting a specially crafted webpage or clicking on a link leading to such content, it requires no prior access to the target system and does not depend on user interaction beyond normal browsing activities. This characteristic makes it highly suitable for drive-by download attacks where users are lured into compromising their own systems through deceptive web pages hosted by threat actors. The critical severity rating assigned by Chromium reflects the high likelihood of successful exploitation in real-world scenarios, as well as the severe consequences associated with full system compromise resulting from sandbox escape.
In terms of industry classification standards, this vulnerability aligns closely with CWE-416, which describes use after free errors where a pointer is used after its memory has been released. Furthermore, the attack technique maps to MITRE ATT&CK tactics involving initial access and privilege escalation, specifically leveraging browser vulnerabilities to bypass security restrictions. The exploitation path demonstrates how attackers leverage memory corruption flaws to transition from low-privilege web content execution to high-privilege system-level control, a common pattern in advanced persistent threats targeting enterprise environments.
Mitigation strategies primarily involve immediate patching of the affected software versions. Organizations and individual users should upgrade Google Chrome to version 155.0.8059.79 or later as soon as possible to eliminate this specific code path vulnerability. Additionally, implementing browser hardening techniques such as disabling JavaScript for untrusted sites can reduce the attack surface, although complete mitigation requires updating the binary itself since the flaw exists in the compiled engine logic rather than just script behavior. Security monitoring solutions should also be configured to detect indicators of compromise associated with known exploit kits targeting this specific Chrome version range, ensuring that any attempted exploitation is identified and blocked before it results in a full system breach.