CVE-2026-19150 in Chrome
Summary
by MITRE • 08/07/2026
Inappropriate implementation in V8 in Google Chrome prior to 151.0.7922.109 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 08/07/2026
This vulnerability represents a critical sandbox escape flaw in Google Chrome's V8 JavaScript engine that existed prior to version 151.0.7922.109. The issue stems from an improper implementation within the V8 engine's handling of certain HTML page elements, creating a pathway for remote attackers to bypass the security boundaries that normally isolate untrusted code execution. The vulnerability classifies under CWE-248, representing an improper exception handling scenario where the V8 engine fails to properly validate or sanitize input during the parsing and execution phases of JavaScript code processing. This flaw allows attackers to craft malicious HTML pages that can exploit the vulnerable V8 implementation to execute arbitrary code within the browser's sandboxed environment, effectively breaking the fundamental security model that separates trusted browser components from potentially malicious web content.
The technical exploitation of this vulnerability leverages the inherent trust model within Chrome's architecture where V8 processes JavaScript code while maintaining strict security boundaries through sandboxing mechanisms. When a user visits a crafted HTML page containing malicious JavaScript or WebAssembly code, the vulnerable V8 implementation fails to properly validate the execution context, allowing the attacker to manipulate memory layouts or execution flows that should be restricted by the sandbox. This type of attack maps directly to ATT&CK technique T1059.007 for Windows Command Shell and T1059.006 for JavaScript, as attackers can leverage JavaScript-based payloads that exploit the underlying V8 engine's improper input handling. The vulnerability essentially allows privilege escalation within the browser sandbox, enabling attackers to perform actions that should be restricted to the operating system level.
The operational impact of this vulnerability extends beyond simple code execution, as it fundamentally undermines the security model that protects users from malicious websites. Successful exploitation enables attackers to access sensitive user data, manipulate browser sessions, install malware, or even escalate privileges on the underlying operating system. The high severity classification (Chromium security severity: High) reflects the potential for widespread abuse across internet-connected devices, particularly given Chrome's market dominance and the ease with which users can be tricked into visiting malicious websites through phishing campaigns or compromised legitimate sites. The sandbox escape capability means that even if other browser protections remain intact, this flaw creates a backdoor that allows attackers to circumvent multiple layers of security controls.
Mitigation strategies for this vulnerability require immediate patching of affected Chrome versions to 151.0.7922.109 or later, as the fix addresses the root cause within V8's input validation mechanisms and proper exception handling procedures. Organizations should implement browser hardening measures including content security policies, sandbox enforcement, and regular security updates to prevent exploitation attempts. Additionally, users should avoid visiting untrusted websites and maintain updated browser versions with automatic update settings enabled. The remediation process involves ensuring that all V8 engine components properly validate input parameters and implement robust error handling that prevents malicious code from manipulating execution contexts within the JavaScript engine's memory management subsystem. Security monitoring should focus on detecting anomalous JavaScript behavior patterns that might indicate exploitation attempts, particularly those involving memory manipulation or privilege escalation techniques.