CVE-2026-77517

5.4 MEDIUMpublic exploit available

Published 2026-09-21 · Updated 2026-09-22

AI risk analysis

Summary: The flaw allows a workspace user to read or modify content in another user's knowledge base by exploiting improperly authorized document and paragraph routes. This matters because it breaches data isolation and confidentiality.
Exploitability: Exploitation is moderately easy if an attacker has access to the victim’s UUID, as no fixed version addresses the issue.
Blast radius: If exploited, this could lead to significant data leakage or unauthorized modifications across multiple knowledge bases within the system.
Prioritized remediation: Implement proper authorization checks to ensure that only relevant users can access and modify content in their respective knowledge bases.

auth-bypasswebdata-leakageapi-security

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD 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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Weaknesses

CWE-639, CWE-862

Public exploit & PoC references

References

Data: NVD (public domain). Analysis: local $0 model. Defensive use only.