Executive brief
MaxKB is an open-source AI assistant platform for enterprises. A low-privileged user can discover other users' private application identifiers through an unprotected endpoint, then embed those identifiers in their own workflow to trigger the victim's application and capture its responses, bypassing normal access controls. This allows unauthorized interaction with victim applications and creation of audit trail entries under victims' accounts.
Technical details
The vulnerability combines two authorization flaws: the homepage ranking endpoint leaks application_ids from other users' published applications based on name filtering, and workflow application-node execution does not verify permission to invoke referenced applications. An authenticated workspace user can query /homepage/application/question_ranking with a victim application name to obtain the application_id, then save a workflow containing an application-node referencing that id, and trigger it to receive the victim application's output and create chat records under the victim account. No permission checks protect the save path or runtime execution path against cross-user application invocation.
Affected products
- 1Panel-dev MaxKB 2.10.2-lts and earlier
Timeline
- 2026-09-21: disclosed: Security advisory published (GHSA-4w4r-h4x8-mg7h)
- 2026-09-02: other: GitHub security advisory published