CVE-2026-110919 in Chrome
Summary
by MITRE • 10/16/2026
Use after free in V8 in Google Chrome prior to 155.0.8059.84 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 10/16/2026
The vulnerability identified as a use-after-free flaw within the V8 JavaScript engine, which powers Google Chrome prior to version 155.0.8059.84, represents a critical memory safety issue that allows for arbitrary code execution under specific conditions. This type of error occurs when a program continues to use a pointer after it has been freed from memory, leading to undefined behavior that can be exploited by malicious actors. In the context of web browsers like Chrome, this flaw resides in the core engine responsible for parsing and executing JavaScript code found on visited websites. The severity is classified as high because successful exploitation grants an attacker significant control over the victim's system environment within the browser's security sandbox.
From a technical perspective, the vulnerability stems from improper management of memory allocation and deallocation cycles within V8. When a script allocates memory for an object or data structure and subsequently frees it, but retains references to that memory location through other variables or closures, those dangling pointers remain valid in the eyes of the application logic until they are overwritten by new allocations. An attacker can craft a malicious HTML page containing JavaScript code designed to trigger this specific sequence: allocating objects, freeing them, and then accessing them again before the operating system reclaims the space for legitimate use. By carefully controlling what data is written into the freed memory region through subsequent operations, an attacker can manipulate program flow or overwrite critical function pointers, thereby achieving arbitrary code execution.
The operational impact of this vulnerability is severe due to its potential for remote exploitation via a crafted HTML page. Users who visit maliciously designed websites containing exploit code could have their systems compromised without any additional interaction beyond loading the page. Although Chrome employs multiple layers of defense such as sandboxing, heap spraying techniques and precise memory manipulation can sometimes bypass these protections if the underlying engine flaw is sufficiently exploitable. This means that even with modern security mitigations in place, a well-crafted exploit could lead to full system compromise depending on how effectively the attacker navigates around isolation boundaries established by the browser architecture.
Industry standards categorize this type of vulnerability under CWE-416: Use After Free, which highlights risks associated with accessing memory after it has been released. Furthermore, in terms of tactical mapping within the MITRE ATT&CK framework, such exploits often align with techniques related to initial access through spearphishing links or drive-by downloads where users are tricked into visiting compromised sites. The exploitation chain typically involves stages corresponding to execution and privilege escalation if sandbox escape is achieved successfully. Organizations must recognize that while client-side vulnerabilities do not directly compromise server infrastructure, they serve as primary entry points for broader attacks including credential theft, malware installation, and lateral movement within corporate networks once initial access is gained through compromised endpoints.
Mitigation strategies primarily involve updating to the latest stable release of Google Chrome which includes patches addressing this specific memory management issue in V8. Administrators should enforce automatic update policies across all user devices to ensure timely application of security fixes. Additionally, deploying browser hardening configurations such as disabling JavaScript execution on untrusted sites or using content security policies can reduce exposure risk for high-value targets. Security teams must also monitor threat intelligence feeds for indicators of compromise associated with active exploitation campaigns targeting this vulnerability and implement network-level controls like web filtering to block access to known malicious domains hosting exploit kits leveraging this flaw.