CVE-2026-77519

MaxKB: Expired application API keys remain usable on `/chat/api/mcp`

Published 21 Sep 2026 • Updated 21 Sep 2026

Severity: MEDIUM

Description

MaxKB is an open-source AI assistant for enterprise. In 2.10.2-lts and earlier, the /chat/api/mcp authentication path looks up an ApplicationApiKey using only its secret and active status, without enforcing the is_permanent and expire_time checks used by the standard chat API. A previously valid, non-permanent application key that remains active after expiration can initialize the MCP endpoint, list the published application's tool metadata, invoke tools/call, and create durable application_chat and application_chat_record state even though /chat/api/open rejects the same key. No fixed version is available as of this review.

Affected products (1)

• 1Panel-dev MaxKB

Problem types

• CWE-613: Insufficient Session Expiration

References (1)

• https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-r6g6-69fh-c39q