CVE-2026-46701 json
Network-AI: Unauthenticated Cross-Origin MCP Tool Invocation via Empty Default Secret
published 2026-05-21 5 mo ago modified 2026-10-24 15 d ago also GHSA-j3vx-cx2r-pvg8 , EUVD-2026-46019
- cvss
- 7.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 11%
- public exploits
- 0
- none known
Summary
Network-AI is a TypeScript/Node.js multi-agent orchestrator. Prior to version 5.4.5, the MCP SSE server defaults to an empty secret (`process.env['NETWORK_AI_MCP_SECRET'] ?? ''` 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 `config_set`, `agent_spawn`, and `blackboard_write` — against a default-configured localhost server. Version 5.4.5 patches the issue.
Patch / fix
- npm network-ai 5.4.5
- network-ai network-ai 5.4.5
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/Jovancoding/Network-AI/security/advisories/GHSA-j3vx-cx2r-pvg8 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L |
| GitHub | 3.1 | 7.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | network-ai | <5.4.5 |
5.4.5 |
Affected products
- Jovancoding Network-AI
Classification
- Weakness
-
- CWE-346 Origin Validation Error
References
-
github.com
/Jovancoding/Network-AI/commit/dc5048112283f3f4eb6c06dd2bf5aa93ef9339be
patch
-
github.com
/Jovancoding/Network-AI/releases/tag/v5.4.5
patch, release-notes
-
github.com
/Jovancoding/Network-AI/security/advisories/GHSA-j3vx-cx2r-pvg8
web, exploit, mitigation, vendor-advisory
-
github.com
/Jovancoding/Network-AI
package
Sources
- CVE List CVE-2026-46701
- GitHub Advisory GHSA-j3vx-cx2r-pvg8
- NVD CVE-2026-46701
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.