CVE-2026-17896 in Chrome
Summary
by MITRE • 07/30/2026
Use after free in DevTools 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: Medium)
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Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a critical use-after-free condition that existed in the DevTools component of Google Chrome prior to version 151.0.7922.72. The flaw occurred within the browser's debugging and development tools framework, which is designed to provide developers with powerful inspection capabilities for web applications. The vulnerability was classified as a medium severity issue by Chromium security standards but carried significant implications due to its potential for remote code execution within the sandboxed environment. A remote attacker could exploit this weakness by crafting a malicious HTML page that would trigger the use-after-free condition when DevTools attempted to process specific elements or interactions. The technical nature of this flaw stems from improper memory management where freed memory locations were still being accessed or referenced by subsequent operations, creating a scenario where attacker-controlled data could be written to memory locations that had already been deallocated.
The operational impact of this vulnerability extends beyond typical browser security boundaries due to the privileged nature of DevTools functionality. When a user visited a malicious webpage with crafted content, the browser would initialize DevTools components that would then attempt to access freed memory regions through normal processing flows. This particular use-after-free condition allowed for memory corruption that could be leveraged to execute arbitrary code within the sandboxed environment where DevTools operates. The sandbox protection mechanism was effectively bypassed or undermined by this vulnerability, enabling attackers to gain elevated privileges and potentially access sensitive system resources or data that should have been isolated from regular browsing operations.
Security researchers have identified this issue as mapping to CWE-416, which specifically addresses the use of freed memory condition in software systems. The attack vector aligns with techniques described in MITRE ATT&CK framework under T1059 and T1566 categories, where adversaries leverage browser-based exploits to achieve code execution and potentially establish persistent access. The vulnerability demonstrates how seemingly benign debugging tools can become attack vectors when proper memory management controls are absent or insufficient. The exploitation required minimal user interaction beyond visiting a malicious webpage, making it particularly dangerous for widespread deployment. This flaw highlights the importance of thorough memory management reviews in complex browser components that operate with elevated privileges, as even developer tools designed for legitimate purposes can be weaponized when security boundaries are not properly enforced.
Mitigation strategies for this vulnerability required immediate patching and updating of Chrome browsers to version 151.0.7922.72 or later, which contained the necessary memory management fixes and defensive programming controls. Organizations should have implemented browser update policies ensuring all users maintain current versions with security patches applied. Additional protective measures included disabling DevTools functionality in production environments where possible, implementing content filtering systems to detect and block malicious HTML content, and monitoring for unusual browser behavior that might indicate exploitation attempts. The vulnerability underscores the necessity of regular security assessments of browser components and the importance of maintaining up-to-date security practices for all software elements that handle user-provided content or operate with elevated privileges within sandboxed environments.