CVE-2026-19038 in la-forge-mcp
Summary
by MITRE • 08/06/2026
A security vulnerability has been detected in MonomythDevelopment la-forge-mcp 1.0.0. This issue affects the function screenshotElement of the file src/index.ts of the component screenshot_element Tool. Such manipulation of the argument output_name leads to path traversal. The attack can be executed remotely. Upgrading to version 1.1.1 is capable of addressing this issue. The name of the patch is 1102172c9adec4a619e241efd6bfb74f5b1f4332. Upgrading the affected component is advised. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
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Analysis
by VulDB Data Team • 08/06/2026
This vulnerability resides within the MonomythDevelopment la-forge-mcp 1.0.0 framework where the screenshotElement function in src/index.ts demonstrates a critical path traversal flaw through improper validation of the output_name argument. The weakness allows attackers to manipulate file paths and potentially access unauthorized system resources by crafting malicious input parameters that bypass normal directory restrictions.
The technical implementation of this vulnerability stems from inadequate input sanitization within the screenshot_element Tool component, where user-supplied output_name values are directly incorporated into file system operations without proper validation or normalization. This design flaw creates an opportunity for attackers to traverse directories and potentially overwrite critical system files or access sensitive data through carefully constructed path manipulation techniques.
The operational impact of this vulnerability is significant as it enables remote code execution capabilities and arbitrary file access, allowing attackers to perform unauthorized operations on the affected system. The vulnerability affects not only local file system integrity but also potentially compromises the confidentiality and availability of system resources by enabling path traversal attacks that can escalate privileges or extract sensitive information from the application's operating environment.
This issue aligns with CWE-22 Path Traversal vulnerabilities and maps to ATT&CK technique T1059 Command and Scripting Interpreter where adversaries leverage path traversal to execute malicious commands through vulnerable applications. The vulnerability represents a classic example of insufficient input validation that has been addressed through proper sanitization measures in the patched version 1.1.1, which implements the specific fix identified by commit hash 1102172c9adec4a619e241efd6bfb74f5b1f4332.
The vendor response demonstrates professional security practices with timely disclosure and rapid remediation, showcasing effective vulnerability management protocols that align with industry standards for responsible disclosure. Organizations should prioritize immediate upgrade to version 1.1.1 to eliminate this path traversal risk and ensure proper input validation controls are implemented across all file system operations involving user-supplied parameters.
Security teams should implement additional monitoring measures to detect potential exploitation attempts through unusual file access patterns or directory traversal attempts in system logs and network traffic. The fix addresses the root cause by ensuring that all output_name parameters undergo proper validation before being used in file system operations, preventing malicious path manipulation attacks from succeeding.
Organizations using this component should conduct comprehensive security assessments to identify any additional instances of similar input validation weaknesses within their application codebase. The vulnerability highlights the importance of implementing defense-in-depth strategies including input validation, access controls, and regular security testing to prevent exploitation of path traversal vulnerabilities in web applications and system tools.
This remediation approach aligns with NIST SP 800-53 security controls that emphasize proper input validation and secure coding practices for preventing directory traversal attacks. The patch implementation should be verified through penetration testing to ensure complete elimination of the vulnerability and confirmation that legitimate functionality remains intact while unauthorized access attempts are properly blocked.
The incident demonstrates how seemingly minor input validation gaps can create significant security risks in software applications, emphasizing the need for comprehensive security reviews during development lifecycle phases. Proper security training for developers regarding secure coding practices and path traversal prevention techniques should be implemented to reduce similar vulnerabilities in future software releases and maintain overall application security posture.