CVE-2026-7738 puchunjie doc-tools-mcp MCP mcp-server.ts open_document path traversal
Attackers can exploit path traversal in the MCP server to read or modify arbitrary files via manipulated file paths.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-7738?
CVE-2026-7738 is a medium-severity path traversal vulnerability in puchunjie doc-tools-mcp, published on 4 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-22
Which versions are affected by CVE-2026-7738?
2 open source packages ship an affected version, including @puchunjie/doc-tools-mcp.
| Package | Affected | Fixed in |
|---|---|---|
@puchunjie/doc-tools-mcp npm | All versions to 1.0.18 | None |
@puchunjie/doc-tools-mcp npm | All versions to 1.0.18 | None |
How do I fix CVE-2026-7738?
No fix has been published for CVE-2026-7738 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-7738 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7738 exists.
Sources
Also known as GHSA-gcmm-c94j-j47x.