CVE-2026-9155
Summary
by MITRE • 06/25/2026
OS Command Injection vulnerability in Rapid7 InsightConnect Sed Plugin on Linux allows authenticated attackers to execute arbitrary OS commands via the expression parameter due to insufficient input validation.
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Analysis
by VulDB Data Team • 06/25/2026
This vulnerability represents a critical os command injection flaw within the rapid7 insightconnect sed plugin running on linux systems where authenticated users can manipulate the expression parameter to execute arbitrary operating system commands. The root cause stems from inadequate input validation mechanisms that fail to properly sanitize or escape user-supplied data before processing, allowing malicious payloads to be interpreted as shell commands rather than mere strings. This vulnerability directly maps to cwe-77 os command injection which is categorized under the attack technique of mitre att&ck tactic execution with subtechnique command and scripting interpreter. The flaw exists in the sed plugin component of insightconnect platform where user input flows directly into system command execution contexts without proper sanitization or parameterization, creating an attack surface that enables privilege escalation from authenticated user level to full system compromise.
The operational impact of this vulnerability extends beyond simple command execution as it provides attackers with complete control over the affected linux system through the insightconnect platform. An authenticated attacker can leverage this weakness to escalate privileges, access sensitive data, modify system configurations, install malware, or establish persistence mechanisms within the compromised environment. The sed plugin typically processes text manipulation operations and when combined with insufficient input validation creates a pathway for attackers to execute arbitrary commands with the privileges of the insightconnect service account. This vulnerability affects organizations using rapid7 insightconnect solutions where the sed plugin is deployed, potentially exposing critical infrastructure to unauthorized access and data breaches.
Mitigation strategies should focus on implementing comprehensive input validation and sanitization measures at multiple layers within the application architecture. The immediate fix involves parameterizing all user inputs before they reach system command execution points, ensuring that special characters and shell metacharacters are properly escaped or removed from expression parameters. Organizations should implement principle of least privilege controls for insightconnect service accounts and consider network segmentation to limit lateral movement capabilities. Additionally, regular security assessments including dynamic application security testing and static code analysis should be conducted to identify similar injection vulnerabilities across the platform. The implementation of web application firewalls and input validation rules specifically designed to detect os command injection patterns can provide additional defense in depth measures. Organizations must also establish robust monitoring and logging procedures to detect anomalous command execution patterns that may indicate exploitation attempts, while maintaining regular patch management processes for rapid7 products to ensure timely vulnerability remediation.