---
title: "CVE-2026-77521: MaxKB - Command Injection"
description: "MaxKB prior to 2.10.5-lts contains a command injection caused by exposed execute shell tool in SandboxShellBackend without proper restrictions, letting untrusted content cause command execution without human approval, exploit requires untrusted input."
url: https://panop.io/threat-heartbeat/CVE-2026-77521/
---

# CVE-2026-77521 MaxKB - Command Injection

MaxKB prior to 2.10.5-lts contains a command injection caused by exposed execute shell tool in SandboxShellBackend without proper restrictions, letting untrusted content cause command execution without human approval, exploit requires untrusted input.

CVSS base score 10.0 /10

Critical

CISA KEV

Not listed

Public exploit

Proof of concept available

Authentication

Not required

EPSS

1.05% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-77521)

## Details

Type

Command Injection

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Published

21 September 2026

Updated

15 October 2026

Weakness

[CWE-78](https://cwe.mitre.org/data/definitions/78.html)

## Vendor fix

Update to version 2.10.5-lts or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-77521](https://nvd.nist.gov/vuln/detail/CVE-2026-77521)
- [https://github.com/1Panel-dev/MaxKB/commit/594f50f2ea80a502d1c955371ba0438b277c30ea](https://github.com/1Panel-dev/MaxKB/commit/594f50f2ea80a502d1c955371ba0438b277c30ea)
- [https://github.com/1Panel-dev/MaxKB/releases/tag/v2.10.5-lts](https://github.com/1Panel-dev/MaxKB/releases/tag/v2.10.5-lts)
- [https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-f36j-f34j-h3rx](https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-f36j-f34j-h3rx)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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