CVE-2026-77521

critical · 10

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.

CVSS

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EPSS (exploit prob.)

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EPSS percentile

2026-09-21

Published

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

Weaknesses

CWE-78CWE-250CWE-749

References

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/security/advisories/GHSA-f36j-f34j-h3rx

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-77521