CVE-2026-90617
Received Received - Intake

Command Injection in PentestAgent

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: VulDB

Description
A vulnerability was detected in GH05TCREW PentestAgent up to cf882dabea3ed91cef016cdd115e5426315665a2. This vulnerability affects the function run_task of the file interface/main.py of the component MCP HTTP Server. Performing a manipulation results in os command injection. The attack is possible to be carried out remotely. The exploit is now public and may be used. This product adopts a rolling release strategy to maintain continuous delivery. Therefore, version details for affected or updated releases cannot be specified. The pull request to fix this issue awaits acceptance.

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Meta Information

Published
2026-09-14
Last Modified
2026-09-14
Generated
2026-09-14
AI Q&A
2026-09-14
EPSS Evaluated
N/A
NVD
CVE-2026-90617
EUVD
EUVD-2026-77176

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
gh05tcrew pentestagent to cf882dabea3ed91cef016cdd115e5426315665a2 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
CWE-77 The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

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Executive Summary

This vulnerability is an OS command injection flaw in GH05TCREW PentestAgent up to a specific commit. It affects the run_task function in interface/main.py of the MCP HTTP Server component. Attackers can remotely inject and execute arbitrary shell commands on the host system due to insecure default configurations and lack of authentication.

Detection Guidance

Check if PentestAgent's MCP HTTP server is running on port 8080 by using commands like 'netstat -tulnp | grep 8080' or 'ss -tulnp | grep 8080'. Verify if it is bound to 0.0.0.0 instead of 127.0.0.1. Test unauthenticated access by sending an MCP request to endpoints like /mcp/run_task without a token.

Use curl to probe the server: 'curl -X POST http://localhost:8080/mcp/run_task -H "Content-Type: application/json" -d '{"params": {"command": "whoami"}}'' to check for command injection.

Impact Analysis

An attacker could exploit this to execute arbitrary commands on your machine, steal sensitive data, modify configurations, or fully compromise the system. Since the server binds to all interfaces by default, any network client could potentially attack it if exposed.

Compliance Impact

This vulnerability could lead to unauthorized access and data breaches, violating GDPR's data protection requirements and HIPAA's security rules for protected health information. Non-compliance risks include fines, legal action, and reputational damage due to exposed sensitive data.

Mitigation Strategies

Bind the MCP HTTP server to localhost only by setting the host to 127.0.0.1. Enable mandatory authentication by setting the --mcp-token flag with a strong token. Restrict exposed tool endpoints to only those necessary for operation.

Update to the latest version of PentestAgent that includes the authentication fix. If updating is not possible, consider disabling the MCP HTTP server or placing it behind a firewall with strict access controls.

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