Network-AI: Unauthenticated Cross-Origin MCP Tool Invocation via Empty Default Secret

Exploitation

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

CVSS

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

EPSS

• CVE-2026-46701: 0.21% estimated exploitation activity in the next 30 days; percentile 11.29 (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.

Unauthenticated Cross-Origin MCP Tool Invocation via Empty Default Secret | Field | Value | | ---------------- | ----- | | Repository | Jovancoding/Network-AI | | Affected version | v5.4.4 (commit c12686e181f231cf8d7bcf836a96d78f0f0877ac) | Summary The MCP SSE server defaults to an empty secret (process.env['NETWORKAIMCPSECRET'] ?? '' at bin/mcp-server.ts:89), which causes isAuthorized (lib/mcp-transport-sse.ts:254) to return true unconditionally for every request — no Authorization header is required. Simultaneously, handleRequest sets Access-Control-Allow-Origin: (lib/mcp-transport-sse.ts:272) on every response, so a cross-origin browser fetch can read the result without restriction. An unauthenticated attacker who can lure a user to a malicious web page can invoke all 22 exposed MCP tools — including configset, agentspawn, and blackboardwrite — against a default-configured localhost server. Affected Code bin/mcp-server.ts:89 — default secret resolves to empty string, enabling open…

Published by the source

21 May 2026, 22:39 UTC

Last modified by the source

8 Jul 2026, 08:29 UTC

Source last checked

26 Oct 2026, 12:52 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-j3vx-cx2r-pvg8

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-j3vx-cx2r-pvg8

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# Patch Next advisory brief: CVE-2026-46701

Advisory: Network-AI: Unauthenticated Cross-Origin MCP Tool Invocation via Empty Default Secret
IDs: CVE-2026-46701, GHSA-j3vx-cx2r-pvg8
Record: https://patchnext.com/advisories/cve-2026-46701 (revision 2, source checked 26 Oct 2026, 12:52 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.6)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: network-ai 5.4.5. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm network-ai: affected <= 5.4.4; fixed in 5.4.5

## Suggested inspection (read-only)
- `npm ls network-ai --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 network-ai.
- 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-j3vx-cx2r-pvg8 (OSV record GHSA-j3vx-cx2r-pvg8 lists affected ranges: npm network-ai >=0 <5.4.5 (fixed))
- Verified: https://github.com/advisories/GHSA-j3vx-cx2r-pvg8 (GitHub-reviewed advisory GHSA-j3vx-cx2r-pvg8 lists affected ranges: npm network-ai >=0 <=5.4.4)

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