CVE-2026-65086 in OpenShell
Summary
by MITRE • 08/25/2026
NVIDIA OpenShell for Linux contains a vulnerability in its sandbox exec handler, where an attacker could cause an OS command injection. A successful exploit of this vulnerability might lead to code execution, information disclosure, and data tampering.
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Analysis
by VulDB Data Team • 08/25/2026
The NVIDIA OpenShell utility for Linux presents a critical security risk due to a flaw within its sandboxed environment's executable handler mechanism. This component is designed to isolate potentially untrusted or complex commands from the main system shell, providing a controlled execution context. However, the implementation of this sandbox exec handler fails to adequately sanitize input parameters before passing them to underlying operating system command interpreters. This architectural weakness creates an opportunity for OS command injection attacks, where malicious actors can manipulate the intended command structure by injecting additional shell metacharacters or commands into user-supplied inputs that are processed by the OpenShell utility.
The technical nature of this vulnerability stems from improper neutralization of special elements used in operating system commands. When a user provides input to the sandboxed environment, the application does not sufficiently validate or escape characters such as semicolons, pipes, ampersands, or backticks that hold special meaning for the shell interpreter. Consequently, an attacker who can influence these inputs can break out of the intended command context and execute arbitrary system commands with the privileges associated with the OpenShell process. This lack of rigorous input validation represents a classic failure in secure coding practices where trust is incorrectly placed in external data sources without proper verification or encoding mechanisms to prevent interpretation as executable code rather than literal string data.
The operational impact of exploiting this vulnerability is severe and multifaceted, primarily centering on unauthorized remote code execution. An attacker who successfully leverages this command injection flaw can execute arbitrary commands within the context of the vulnerable application. This capability directly leads to full system compromise if OpenShell runs with elevated privileges or sufficient permissions to access sensitive resources. Beyond direct code execution, the vulnerability facilitates significant information disclosure by allowing attackers to read files that are otherwise restricted from their user account. Furthermore, it enables data tampering, as malicious actors can modify, delete, or corrupt critical system and application data stored on the host machine. The ability to execute arbitrary commands also opens pathways for lateral movement within a networked environment if OpenShell is accessible over a network interface or if an attacker gains initial foothold through another vector that allows interaction with this utility.
From a classification perspective, this vulnerability aligns closely with CWE-78 Improper Neutralization of Special Elements used in an OS Command commonly known as OS Command Injection. It also maps to MITRE ATT&CK techniques related to command and script interpretation, specifically T1059 which covers various scripting languages including shell scripts often targeted by such injection flaws. The exploitation vector typically involves providing crafted input through any interface that accepts user data for processing by the OpenShell sandbox handler, whether via local terminal interaction or potentially remote API calls if exposed.
Mitigation strategies must focus on immediate remediation and defensive hardening. NVIDIA should release a patched version of OpenShell that implements strict input validation and output encoding to ensure that all special characters are properly escaped before being passed to system interpreters. Developers should adopt parameterized command execution methods where possible, avoiding the direct concatenation of user inputs into shell commands. In the interim, administrators should restrict access to the OpenShell utility to trusted users only, apply principle of least privilege by ensuring it runs with minimal necessary permissions, and monitor for unusual process creation events that may indicate exploitation attempts. Regular security audits and static code analysis focused on command injection patterns are essential to prevent similar vulnerabilities in future updates or related NVIDIA software components.