@andrea9293/mcp-documentation-server: Web UI API binds to all interfaces without authentication by default

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

8.8 · CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

• CVE-2026-54504: 0.57% estimated exploitation activity in the next 30 days; percentile 47.37 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary @andrea9293/mcp-documentation-server v1.13.0 documents that a Web UI starts automatically on port 3080. However, the Web UI/API appears to bind to all network interfaces by default (:3080 / 0.0.0.0:3080) instead of localhost-only, and its document-management API endpoints do not require authentication. As a result, any network-reachable client on the same LAN, VM network, or container bridge can access the document-admin API without credentials. In my reproduction, I was able to enumerate documents, add a document, read its full content, search across the corpus, and delete the document through the host's LAN IP. The issue is not that a Web UI exists. The issue is that a local document-management Web UI/API is exposed on all interfaces by default without authentication. Details The README documents that the Web UI starts automatically and tells users to open: It also documents STARTWEBUI=true and WEBPORT=3080 as the defaults. The vulnerable behavior appears to come from…

Published by the source

15 Jul 2026, 23:26 UTC

Last modified by the source

18 Jul 2026, 00:35 UTC

Source last checked

26 Oct 2026, 12:57 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-6f5r-5672-72j7

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-6f5r-5672-72j7

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# Patch Next advisory brief: CVE-2026-54504

Advisory: @andrea9293/mcp-documentation-server: Web UI API binds to all interfaces without authentication by default
IDs: CVE-2026-54504, GHSA-6f5r-5672-72j7
Record: https://patchnext.com/advisories/cve-2026-54504 (revision 2, source checked 26 Oct 2026, 12:57 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @andrea9293/mcp-documentation-server 1.13.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @andrea9293/mcp-documentation-server: affected >= 1.13.0, <= 1.13.0; fixed in 1.13.1

## Suggested inspection (read-only)
- `npm ls @andrea9293/mcp-documentation-server --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @andrea9293/mcp-documentation-server.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-6f5r-5672-72j7 (OSV record GHSA-6f5r-5672-72j7 lists affected ranges: npm @andrea9293/mcp-documentation-server >=1.13.0 <1.13.1 (fixed))
- Verified: https://github.com/advisories/GHSA-6f5r-5672-72j7 (GitHub-reviewed advisory GHSA-6f5r-5672-72j7 lists affected ranges: npm @andrea9293/mcp-documentation-server >=1.13.0 <=1.13.0)

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