CVE-2026-77523 MaxKB: Cross-workspace model parameter form write
Authenticated users can read or modify model parameters in other workspaces by manipulating model IDs, bypassing workspace isolation controls.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-77523?
CVE-2026-77523 is a high-severity missing authorization vulnerability in 1Panel-dev MaxKB, published on 21 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
MaxKB is an open-source AI assistant for enterprise. In version 2.10.3-lts and earlier, the model parameter form route authorizes the path workspace but ModelSerializer.ModelParams loads and saves a Model by id alone without including workspace_id in the query. An authenticated user with model read permission in an attacker-controlled workspace can supply a known victim model_id to read or overwrite the victim's model_params_form in another workspace, potentially altering workflows that use those defaults. No fixed version is available as of this review.
Weakness: CWE-639
Which versions are affected by CVE-2026-77523?
How do I fix CVE-2026-77523?
No fix has been published for CVE-2026-77523 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-77523 being exploited?
There is no known exploitation of CVE-2026-77523 in the wild and no public exploit code.
Sources
Also known as GHSA-g888-8cvh-9284.