CVE-2026-17744 in Chrome
Summary
by MITRE • 07/30/2026
Inappropriate implementation in File Input in Google Chrome on Linux prior to 151.0.7922.72 allowed a remote attacker to potentially perform a sandbox escape 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 sandbox escape vector within the Chromium-based Google Chrome browser on Linux systems, specifically affecting versions prior to 151.0.7922.72. The issue stems from an insecure implementation in the file input handling mechanism that allows malicious actors to bypass the browser's security boundaries. The flaw occurs when processing crafted HTML pages that manipulate file input elements in ways that circumvent expected validation controls, potentially enabling unauthorized access to system resources and file operations beyond the intended sandbox constraints.
The technical exploitation of this vulnerability leverages the improper handling of file input objects within Chrome's rendering engine, where the browser fails to adequately validate or sanitize user-supplied file paths and attributes. This insecure implementation creates a pathway for remote attackers to execute code outside the designated browser sandbox environment, potentially allowing access to local files, system directories, or execution of arbitrary commands with elevated privileges. The vulnerability specifically affects Linux installations where Chrome's security model relies heavily on process isolation and file access controls that are compromised by this flaw.
From an operational perspective, this medium severity vulnerability poses significant risks to organizations relying on Chrome for web browsing operations. Attackers could craft malicious HTML pages that, when loaded in the vulnerable browser version, would allow them to escape the sandbox environment and gain unauthorized access to sensitive data stored locally on the system. The impact extends beyond simple data theft to potential system compromise, as successful exploitation could enable attackers to establish persistent access or escalate privileges within the compromised environment.
The vulnerability aligns with CWE-276, which addresses improper file permissions and inadequate access control mechanisms, while also mapping to ATT&CK technique T1059 for command and scripting interpreter usage. Organizations should immediately update to Chrome version 151.0.7922.72 or later to remediate this issue, as the patch implements proper validation of file input parameters and strengthens the sandbox boundary enforcement mechanisms. Additional mitigations include implementing strict content security policies, disabling unnecessary browser features, and maintaining comprehensive monitoring for suspicious file access patterns that might indicate exploitation attempts.
Security teams should also consider deploying network-based intrusion detection systems capable of identifying malicious HTML page delivery patterns and monitoring for anomalous file input behavior in browser processes. The vulnerability demonstrates the critical importance of proper sandbox implementation and input validation in modern browser security architectures, where even seemingly benign functionality can create substantial attack surface when implemented incorrectly. Regular security assessments of browser configurations and user access controls remain essential to prevent exploitation of similar vulnerabilities in other browser components or related web technologies.