Path Traversal in Nikolaibibo Claude-Comfyui-Mcp
CVE-2026-19371
A vulnerability was identified in Nikolaibibo claude-comfyui-mcp 1.0.0. Affected is the function copyFileSync of the file src/tools/utils.ts of the component comfy_upload_image. Such manipulation of the argument image_path leads to path traversal. An attack has to be approached locally. The project was informed of the problem early through an issue report but has not responded yet.
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
- Nikolaibibo Claude-Comfyui-Mcp — versions 1.0.0
Weakness classification (CWE)
References
- vuldb.com/vuln/387255 (technical-description, vdb-entry)
- vuldb.com/vuln/387255/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-19371 (third-party-advisory)
- vuldb.com/submit/866269 (third-party-advisory)
- github.com/Nikolaibibo/claude-comfyui-mcp/issues/3 (issue-tracking)
- github.com/Nikolaibibo/claude-comfyui-mcp/ (product)
Frequently asked questions
- What is CVE-2026-19371?
- CVE-2026-19371 is a medium-severity vulnerability in Nikolaibibo Claude-Comfyui-Mcp, classified under Path Traversal. CVSS score: 5.3/10. Published 2026-08-09.
- How severe is CVE-2026-19371?
- Medium severity. CVSS v3 base score is 5.3 out of 10.