CVE-2026-77516

5.4 MEDIUMpublic exploit available

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

AI risk analysis

Summary: Users with a low role can still execute tools they are denied access to by binding identifiers through various paths, leading to potential credential exposure.
Exploitability: Exploitation requires knowledge of the tool IDs and permission structure; preconditions include having a low-role workspace member account.
Blast radius: If exploited, this flaw could lead to unauthorized execution of tools and potential credential theft within the enterprise environment.
Prioritized remediation: Restrict tool execution paths to enforce per-tool grants and ensure that dispatch paths reapply these grants.

rceauth-bypasswebapi

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 2.9.2, a lowest-role workspace member denied access to a tool by WorkspaceUserResourcePermission can still bind its identifier through tool_ids, skill_tool_ids, or mcp_tool_ids and execute it through the agent or workflow dispatch path. The dispatch path does not reapply the per-tool grant enforced by dedicated tool routes, and tool execution decrypts server-side init_params, allowing the caller to receive credentials carried by the denied tool. 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

https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-383v-fx78-pphm

All references

https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-383v-fx78-pphm

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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