CVE-2026-15776 in Chrome
Summary
by MITRE • 07/15/2026
Inappropriate implementation in V8 in Google Chrome prior to 150.0.7871.125 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 • 07/15/2026
This vulnerability represents a critical sandbox escape flaw in the V8 JavaScript engine that powered Google Chrome prior to version 150.0.7871.125. The issue stems from an improper implementation that allows remote attackers to bypass the security boundaries designed to isolate untrusted code execution. The vulnerability specifically affects the V8 engine's handling of certain HTML page constructs that trigger unexpected behavior in the JavaScript runtime environment, creating a pathway for privilege escalation outside the intended sandboxed execution context.
The technical flaw manifests when maliciously crafted HTML content triggers an unintended code path within V8's memory management or object handling mechanisms. This misimplementation enables attackers to manipulate the engine's internal state in ways that were not anticipated during the design phase of the sandbox architecture. The vulnerability operates at a fundamental level where the boundary between safe and unsafe execution contexts becomes porous, allowing arbitrary code execution with elevated privileges.
From an operational impact perspective, this vulnerability presents a severe threat to user security since it enables remote code execution without requiring any user interaction beyond visiting a malicious webpage. The high severity classification reflects the ease with which attackers can exploit this flaw to gain full control over affected systems, potentially leading to data theft, system compromise, or further lateral movement within network environments. The vulnerability affects all versions prior to 150.0.7871.125, making it particularly dangerous as users may be exposed for extended periods while awaiting updates.
The security implications extend beyond simple code execution to encompass complete system compromise due to the sandbox bypass nature of this vulnerability. According to CWE standards, this represents a weakness in the design and implementation of security controls that allows privilege escalation through improper handling of trusted data within the JavaScript engine. The ATT&CK framework categorizes this as a sandbox escape technique that enables attackers to move beyond initial access boundaries and gain elevated system privileges.
Organizations should immediately implement mitigations including prompt deployment of Chrome version 150.0.7871.125 or later, which contains the necessary patches to address the V8 implementation flaw. Network administrators should consider implementing additional security measures such as content filtering and web application firewalls to detect and block potentially malicious HTML content. Users should be educated about the risks of visiting untrusted websites and the importance of keeping their browsers updated. The vulnerability highlights the critical need for robust security testing and code review processes in complex systems like JavaScript engines where memory safety is paramount to overall system security.