CVE-2026-17729 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 who had compromised the renderer process to potentially perform out of bounds memory access via a crafted HTML page. (Chromium security severity: Medium)
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a use-after-free condition within the V8 JavaScript engine component of Google Chrome, specifically affecting versions prior to 151.0.7922.72. The flaw occurs when the renderer process executes maliciously crafted HTML content that triggers improper memory management during JavaScript object lifecycle handling. The vulnerability is classified as a CWE-416 Use After Free weakness, which falls under the broader category of memory safety issues in software development. When a JavaScript object is freed from memory but references to it persist, subsequent operations may access invalid memory locations, potentially leading to memory corruption and arbitrary code execution.
The security impact of this vulnerability manifests when an attacker compromises the renderer process through phishing or malicious website delivery methods. Once inside the renderer context, the attacker can construct a carefully crafted HTML page that exploits the use-after-free condition in V8's garbage collection mechanisms. The Chromium security severity rating of Medium reflects the requirement for process compromise as a prerequisite, though this still represents a significant threat vector given the privileged nature of renderer processes. Memory access violations resulting from this flaw could enable attackers to execute arbitrary code with the privileges of the compromised browser process.
The operational impact extends beyond simple code execution to potentially allow privilege escalation attacks within the browser sandbox environment. While the initial compromise requires gaining control of the renderer process, successful exploitation could provide a foothold for more sophisticated attacks including data exfiltration, system reconnaissance, or further exploitation of other browser components. Attackers may leverage this vulnerability to bypass security controls such as site isolation mechanisms and sandbox restrictions that typically protect user systems from cross-site attacks.
Mitigation strategies should focus on immediate patch deployment to update Chrome versions to 151.0.7922.72 or later, which contains the necessary fixes for the V8 memory management issue. Organizations should also implement additional security layers including web application firewalls, content security policies, and regular browser security updates as part of their defensive posture. Browser hardening techniques such as disabling unnecessary JavaScript features, implementing strict sandboxing, and monitoring for anomalous memory access patterns can provide additional protection against exploitation attempts. The vulnerability aligns with ATT&CK technique T1059.007 for PowerShell and T1211 for exploitation of memory corruption vulnerabilities, highlighting the need for comprehensive endpoint detection and response capabilities.