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High, CVSS 8.7amended

Network-AI missing authentication on MCP HTTP endpoint, which allows unauthenticated privileged tool calls

CVE-2026-42856GHSA-fj4g-2p96-q6m3

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (network-ai 5.1.3), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
8.7 · 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 · score source
EPSS
  • CVE-2026-42856: 0.55% estimated exploitation activity in the next 30 days; percentile 46.03 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Security Advisory: Missing Authentication for Critical Function in Jovancoding/Network-AI | Field | Value | |---|---| | Project | Jovancoding/Network-AI | | Repository | https://github.com/Jovancoding/Network-AI | | Affected commit | c344f2053eb0d49395988f803bf92f2a86b2a0d0 | | Affected tested version | 5.1.2 | | Vulnerability type | CWE-306: Missing Authentication for Critical Function | | Severity | High | | Authentication required | None | | Default network exposure | Bind address 0.0.0.0 | | Reporter validation date | 2026-04-21 | Summary 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 — including reading and mutating the live orchestrator configuration, listing registered agents, dispatching…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-fj4g-2p96-q6m3

  2. Revision 2 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  3. Revision 1 · created ·

    Published from osv record GHSA-fj4g-2p96-q6m3

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-42856

Advisory: Network-AI missing authentication on MCP HTTP endpoint, which allows unauthenticated privileged tool calls
IDs: CVE-2026-42856, GHSA-fj4g-2p96-q6m3
Record: https://patchnext.com/advisories/cve-2026-42856 (revision 3, 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 8.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: network-ai 5.1.3. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm network-ai: affected <= 5.1.2; fixed in 5.1.3

## 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-fj4g-2p96-q6m3 (OSV record GHSA-fj4g-2p96-q6m3 lists affected ranges: npm network-ai >=0 <5.1.3 (fixed))
- Verified: https://github.com/advisories/GHSA-fj4g-2p96-q6m3 (GitHub-reviewed advisory GHSA-fj4g-2p96-q6m3 lists affected ranges: npm network-ai >=0 <=5.1.2)

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