# CVE-2026-6108: 1Panel-dev MaxKB Model Context Protocol Node base_mcp_node.py execute os command injection

> Remote attackers can execute arbitrary OS commands via the Model Context Protocol Node in MaxKB, requiring an upgrade to mitigate.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Apr 2026
- **Updated:** 14 Apr 2026
- **Also known as:** GHSA-w5c9-9mc5-jw55

## What is CVE-2026-6108?

CVE-2026-6108 is a medium-severity command injection vulnerability in 1Panel-dev MaxKB, published on 12 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was found in 1Panel-dev MaxKB up to 2.6.1. The affected element is the function execute of the file apps/application/flow/step_node/mcp_node/impl/base_mcp_node.py of the component Model Context Protocol Node. Performing a manipulation results in os command injection. The attack is possible to be carried out remotely. The exploit has been made public and could be used. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command), CWE-77 (Improper Neutralization of Special Elements used in a Command)

## Which versions are affected by CVE-2026-6108?


## How do I fix CVE-2026-6108?

No fix has been published for CVE-2026-6108 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-6108 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6108 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-6108 and fix it if it is affected.

What it is: CVE-2026-6108 is a medium-severity command injection vulnerability in 1Panel-dev MaxKB, published on 12 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6108 exists.

Affected product: 1Panel-dev MaxKB. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-6108/ (Markdown: https://insights.sbomify.com/CVE-2026-6108/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-6108
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6108
- OSV: https://osv.dev/vulnerability/CVE-2026-6108

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-6108/
Summaries are generated and may contain mistakes; the official description above is the record.