Is CVE-2026-42856 actively exploited?

No active exploitation of CVE-2026-42856 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-42856 be exploited remotely?

Yes. CVE-2026-42856 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-42856?

CVE-2026-42856 has a CVSS score of 8.7 (HIGH).

HOME VULNERABILITIESCVE-2026-42856

HIGH

CVE-2026-42856

CWE-306Published: May 11, 2026· Updated: May 13, 2026

8.7

CVSS v3.1

EPSS:0.05%probability of exploitation in 30 daysPercentile:15.4th

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.

NVD Source

Technical Analysis

CVE-2026-42856 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X