High severity8.1NVD Advisory· Published Oct 1, 2026

CVE-2026-103758

Description

Obot 0.21.1 through 0.24.1 contains an authorization bypass vulnerability that allows authenticated users to reach MCP servers because the checkUI deny list omits the /mcp-connect-composite/ route. Basic-role users with a composite MCP ID can proxy requests through mcpGateway.Proxy to invoke tools on MCP servers restricted by Access Control Rules.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Obot Platform/obotllm-fuzzy
Range: 0.21.1 - 0.24.1

Patches

Vulnerability mechanics

References

github.com/obot-platform/obot/security/advisories/GHSA-6fwv-3h4c-37j9nvd
www.vulncheck.com/advisories/obot-0.21.1-through-0.24.1-authorization-bypass-via-mcp-connect-composite-routenvd

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