CVE-2026-77521

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-78
• CWE-250
• CWE-749

• 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
• https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-f36j-f34j-h3rx

Published

Sep 21, 2026

Last Modified

Sep 22, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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