CVE-2026-77517 MaxKB cross-knowledge IDOR lets a normal user read and modify documents and paragraphs in another knowledge base
Attackers can read and modify documents in other users' knowledge bases by exploiting missing ownership checks on document and paragraph IDs.
- 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-2026-77517?
CVE-2026-77517 is a medium-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. From version 2.0.0 through 2.10.2-lts, document and paragraph operate routes authorize only knowledge_id in the request path, then query the target Document by document_id or Paragraph by paragraph_id without confirming that the object belongs to that knowledge base. A normal workspace user with a known victim document or paragraph UUID can use an attacker-owned knowledge-base path to read or modify content in another user's knowledge base. No fixed version is available as of this review.
Which versions are affected by CVE-2026-77517?
How do I fix CVE-2026-77517?
No fix has been published for CVE-2026-77517 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-2026-77517 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-77517 exists.
Sources
Also known as GHSA-58cm-c5jq-96vf.