Vulnerability · Published May 11, 2026 · Assigned by GitHub_M

CVE-2026-42856Network-AI: Missing authentication on MCP HTTP endpoint allows unauthenticated privileged tool calls

High 8.7

In plain English

A high-severity missing authentication in Network-AI from Jovancoding. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)8.7High

Exploit odds (30 days)0.5%top 53.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Network-AI is a TypeScript/Node.js multi-agent orchestrator. Prior to 5.1.3, the MCP HTTP transport accepts JSON-RPC tools/call requests with no authentication, session, origin, or token check, and dispatches them directly to the orchestrator's tool registry. The default bind address is 0.0.0.0. As a result, any party with network reachability to the service can enumerate and invoke privileged management tools. This vulnerability is fixed in 5.1.3.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	network-ai	5.1.3	GHSA-fj4g-2p96-q6m3

Affected products (as reported)

Vendor	Product	Versions
Jovancoding	Network-AI	< 5.1.3

Weakness: CWE-306 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

References

https://github.com/Jovancoding/Network-AI/security/advisories/GHSA-fj4g-2p96-q6m3 x_refsource_CONFIRM