CVE-2026-77521

CRITICAL 10.0

MaxKB: Prompt-injectable agent can lead to command execution

CVSS Score

10.0

EPSS Score

0.0%

EPSS Percentile

0th

MaxKB is an open-source AI assistant for enterprise. Prior to version 2.10.5-lts, assistants with a tool, MCP tool, skill, or sub-application use SandboxShellBackend, which exposes an execute shell tool without excluding it and omits execute from interrupt_on, so human approval is not required. Untrusted chat or ingested content can therefore cause command execution; source deployments with MAXKB_SANDBOX disabled run commands directly as the application user, while the official root container's string-based gosu wrapper allowed shell metacharacters to execute outside the intended sandbox. This issue is fixed in version 2.10.5-lts.

CWE	CWE-78 CWE-250 CWE-749
Vendor	1panel-dev
Product	maxkb
Published	Sep 21, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

1Panel-dev / MaxKB

< 2.10.5-lts

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-f36j-f34j-h3rx github.com: https://github.com/1Panel-dev/MaxKB/commit/594f50f2ea80a502d1c955371ba0438b277c30ea github.com: https://github.com/1Panel-dev/MaxKB/releases/tag/v2.10.5-lts