CVE-2026-8664 in InsightConnect Finger Plugin
Summary
by MITRE • 06/25/2026
OS Command Injection vulnerability in Rapid7 InsightConnect Finger Plugin on Linux allows authenticated attackers to execute arbitrary OS commands via the user or host parameters due to insufficient input validation in shell command construction.
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Analysis
by VulDB Data Team • 06/25/2026
This os command injection vulnerability exists within the rapid7 insightconnect finger plugin operating on linux systems where authenticated attackers can execute arbitrary operating system commands through manipulation of the user or host parameters. The flaw stems from inadequate input validation during shell command construction processes, creating a direct pathway for malicious command execution. The vulnerability operates at the core level of command line interface handling where user-supplied data directly influences system call formation without proper sanitization or escaping mechanisms.
The technical implementation of this vulnerability follows established patterns identified in common weakness enumeration cwe-77 which categorizes improper neutralization of special elements used in os commands as a critical security flaw. Attackers exploit the insufficient validation by injecting malicious command sequences into the user or host parameters that are then concatenated directly into shell execution contexts. This allows for arbitrary code execution with the privileges of the executing service account, potentially escalating to system compromise depending on the privilege level of the insightconnect plugin process.
From an operational impact perspective this vulnerability presents significant risk to organizations utilizing rapid7 insightconnect platforms as it enables authenticated attackers to gain unauthorized access to underlying operating systems through legitimate plugin interfaces. The attack vector requires only authentication credentials which are often less strictly controlled than privileged system access, making exploitation more likely in environments where proper access controls are not implemented. The compromised system could potentially provide attackers with persistent access for data exfiltration, lateral movement, or further system compromise.
Mitigation strategies should focus on implementing proper input validation and sanitization mechanisms that prevent command injection attacks by escaping or filtering special characters before they reach shell execution contexts. Organizations must enforce principle of least privilege for insightconnect plugin services and implement network segmentation to limit potential attack scope. Regular security updates and patch management procedures are essential as this vulnerability affects specific plugin versions where rapid7 has provided remediation measures. Additionally implementing web application firewalls and monitoring for suspicious command execution patterns can help detect exploitation attempts while maintaining compliance with security frameworks such as nist 800-53 and iso 27001 requirements for secure system development and operation practices.
The vulnerability demonstrates how seemingly benign plugin interfaces can create critical attack surfaces when proper security controls are not implemented during development phases. This aligns with attack pattern identification in the mitre attack framework where command execution techniques represent common methods used by adversaries to establish persistent access and escalate privileges within compromised environments. Organizations should conduct comprehensive security assessments of all integrated plugins and third-party tools to identify similar vulnerabilities that could provide attackers with unauthorized system access through legitimate operational interfaces.