CVE-2026-17665 in Chrome
Summary
by MITRE • 07/30/2026
Use after free in V8 in Google Chrome prior to 151.0.7922.72 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 • 07/30/2026
This vulnerability represents a critical use-after-free condition in the V8 JavaScript engine component of Google Chrome, affecting versions prior to 151.0.7922.72. The flaw resides within the memory management mechanisms of V8 where freed memory blocks are still accessible and potentially writable by malicious code. Such vulnerabilities typically occur when the JavaScript engine fails to properly track object lifecycles, allowing an attacker to manipulate memory references after objects have been deallocated. The security implications are severe as this condition can be exploited to achieve arbitrary code execution within the browser's sandboxed environment.
The technical exploitation of this vulnerability requires a sophisticated attack vector that leverages the specific memory layout and garbage collection behavior of V8. Attackers craft malicious HTML pages containing carefully constructed JavaScript code that triggers the use-after-free scenario during normal page rendering or script execution. The flaw essentially allows an attacker to corrupt memory contents by accessing freed objects, potentially enabling them to overwrite function pointers, control structures, or other critical data elements within the JavaScript engine's memory space. This type of vulnerability falls under CWE-416, which specifically addresses use-after-free conditions in software development.
From an operational perspective, this vulnerability presents a significant risk to users as it allows remote code execution without requiring user interaction beyond visiting a malicious webpage. The sandbox protection mechanisms that normally isolate browser processes from the underlying operating system are bypassed through this exploitation technique, effectively neutralizing Chrome's security boundaries. The Chromium security severity classification of High reflects the ease with which attackers can leverage this vulnerability to gain unauthorized access to systems. This particular flaw demonstrates how memory safety issues in core components like JavaScript engines can undermine entire browser security architectures.
The mitigation strategy for this vulnerability involves immediate updating of Google Chrome to version 151.0.7922.72 or later, which includes patches addressing the specific memory management issues within V8. Organizations should implement comprehensive patch management policies ensuring all browser installations are kept current with the latest security updates. Additionally, network administrators can deploy web application firewalls and content filtering solutions to block access to known malicious domains until systems are patched. The remediation process should also include monitoring for indicators of compromise and conducting security assessments to verify that no exploitation attempts have occurred. This vulnerability serves as a reminder of the critical importance of maintaining up-to-date software components and implementing layered defensive strategies against sophisticated browser-based attacks.