CVE-2026-7738: @puchunjie/doc tools mcp Path Traversal Vulnerability

LOW
Advisory Identifier: GHSA-gcmm-c94j-j47x
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CVSS 6.3
CWE-22
Published
Advisory Summary

CVE-2026-7738 is a LOW (CVSS 6.3) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting @puchunjie/doc tools mcp libraries in the npm ecosystem. The issue involves @puchunjie/doc-tools-mcp has a path traversal issue. Remediation is available in the latest vendor maintenance releases.

CVE-2026-7738 at a Glance

CVE Identifier CVE-2026-7738
GHSA Identifier GHSA-gcmm-c94j-j47x
Severity LOW
CVSS v3.1 Base Score 6.3
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product @puchunjie/doc tools mcp
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 6.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2026-7738

To remediate this vulnerability, upgrade all affected @puchunjie/doc tools mcp dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

@puchunjie/doc-tools-mcp fixed: Latest secure release 
npm install @puchunjie/doc-tools-mcp@Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls @puchunjie/doc-tools-mcp

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-7738, inspect your project dependencies using npm:

npm ls @puchunjie/doc-tools-mcp

Analyze the terminal output to locate any version of @puchunjie/doc tools mcp in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The npm ls @puchunjie/doc-tools-mcp command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In @puchunjie/doc tools mcp, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2026-7738 Affected @puchunjie/doc tools mcp Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
@puchunjie/doc-tools-mcp
npm/@puchunjie/doc-tools-mcp
npm
≤ 1.0.18

References

NVD — CVE-2026-7738 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-7738
@puchunjie/doc tools mcp Source Repository REPOSITORY
https://github.com/BruceJqs/public_exp/issues/38
@puchunjie/doc tools mcp Source Repository REPOSITORY
https://github.com/puchunjie/doc-tools-mcp/issues/4
@puchunjie/doc tools mcp Source Repository REPOSITORY
https://github.com/puchunjie/doc-tools-mcp
vuldb.com/submit/807642 WEB
https://vuldb.com/submit/807642
vuldb.com/vuln/360913 WEB
https://vuldb.com/vuln/360913
vuldb.com/vuln/360913/cti WEB
https://vuldb.com/vuln/360913/cti

Frequently Asked Questions

What is CVE-2026-7738?
CVE-2026-7738 is a security vulnerability in @puchunjie/doc tools mcp involving @puchunjie/doc-tools-mcp has a Path Traversal Issue under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which @puchunjie/doc tools mcp versions are affected?
Affected versions include releases prior to current release patches across affected packages: @puchunjie/doc-tools-mcp.
What version fixes CVE-2026-7738?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is @puchunjie/doc-tools-mcp affected?
Yes, @puchunjie/doc-tools-mcp is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-7738?
CVE-2026-7738 has a CVSS v3.1 base score of 6.3 (LOW) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2026-7738?
CVE-2026-7738 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check npm dependencies for CVE-2026-7738?
Run the dependency tree command: 'npm ls @puchunjie/doc-tools-mcp'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-gcmm-c94j-j47x",
  "modified" : "2026-05-08T16:54:55Z",
  "published" : "2026-05-04T09:31:09Z",
  "aliases" : [ "CVE-2026-7738" ],
  "summary" : "@puchunjie/doc-tools-mcp has a Path Traversal Issue",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@puchunjie/doc-tools-mcp"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.0.18"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-7738"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/BruceJqs/public_exp/issues/38"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/puchunjie/doc-tools-mcp/issues/4"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/puchunjie/doc-tools-mcp"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/submit/807642"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/vuln/360913"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/vuln/360913/cti"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-08T16:54:55Z",
    "nvd_published_at" : "2026-05-04T07:16:01Z"
  }
}