Path Traversal in Automateyournetwork Mcpyats
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.001 (3.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 3.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
- Automateyournetwork Mcpyats — versions 0.1.0, 0.1.1, 0.1.2
Weakness classification (CWE)
References
- vuldb.com/vuln/387174 (technical-description, vdb-entry)
- vuldb.com/vuln/387174/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-19338 (third-party-advisory)
- vuldb.com/submit/865262 (third-party-advisory)
- github.com/automateyournetwork/MCPyATS/issues/22 (issue-tracking)
- github.com/automateyournetwork/MCPyATS/ (product)
Frequently asked questions
- What is CVE-2026-19338?
- CVE-2026-19338 is a medium-severity vulnerability in Automateyournetwork Mcpyats, classified under Path Traversal. CVSS score: 5.3/10. Published 2026-08-09.
- How severe is CVE-2026-19338?
- Medium severity. CVSS v3 base score is 5.3 out of 10.