automateyournetwork MCPyATS up to 0.1.4 generate_mermaid_markdown index.ts processGenerateRequest folder/name path traversal

Summaryinfo

A vulnerability was found in automateyournetwork MCPyATS up to 0.1.4 and classified as critical. The impacted element is the function processGenerateRequest of the file mcp_servers/mermaid/index.ts of the component generate_mermaid_markdown. The manipulation of the argument folder/name results in path traversal. This vulnerability is cataloged as CVE-2026-19338. The attack must be initiated from a local position. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in automateyournetwork MCPyATS up to 0.1.4. Affected is the function processGenerateRequest of the file mcp_servers/mermaid/index.ts of the component generate_mermaid_markdown. The manipulation of the argument folder/name with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-19338. The exploitability is told to be easy. Local access is required to approach this attack. Technical details and a exploit are known. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Automation Software

Vendor

• automateyournetwork

Name

• MCPyATS

Version

• 0.1.0
• 0.1.1
• 0.1.2
• 0.1.3
• 0.1.4

Website

• Product: https://github.com/automateyournetwork/MCPyATS/

CPE 2.3info

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CPE 2.2info

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Submitinfo

Accepted

• Submit #865262: automateyournetwork MCPyATS 0.1.4 Path Traversal (by gongyanyu04)

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