CVEvulnerability

CVE-2026-77521

10.0 CRITICAL Published 2026-09-21 Modified 2026-09-22 Official page ↗
Status
Deferred
Published
2026-09-21
Last modified
2026-09-22
Assigner
[email protected]
CVSS 3.1 ([email protected])
10.0 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weaknesses
CWE-250, CWE-749, CWE-78

Description

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.

Related

Weakness · CWE (3)

  • CWE-250 Execution with Unnecessary Privileges weakness
  • CWE-749 Exposed Dangerous Method or Function weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command weakness

References