CVE-2026-19338

A vulnerability was identified in automateyournetwork MCPyATS up to 0.1.4. The affected 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 leads to path traversal. The attack must be carried out locally.

CVSS 4.0

1.9CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

CVSS 3.1

5.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

EPSS

0.2% chance of exploitation in the next 30 days; higher than 6% of CVEs (scores of 2026-10-25)

CWE

CWE-22

Published

2026-08-09

Modified

2026-10-23

Record from

the NVD, synced 2026-10-24

References

• https://github.com/automateyournetwork/MCPyATS/
• https://github.com/automateyournetwork/MCPyATS/issues/22
• https://vuldb.com/cve/CVE-2026-19338
• https://vuldb.com/submit/865262
• https://vuldb.com/vuln/387174

Check your stackJSON