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.
Advisories

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Fixes

Solution

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Workaround

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History

Thu, 01 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 01 Oct 2026 14:00:00 +0000

Type Values Removed Values Added
First Time appeared Obot-platform
Obot-platform obot
Vendors & Products Obot-platform
Obot-platform obot

Thu, 01 Oct 2026 11:00:00 +0000

Type Values Removed Values Added
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.
Title Obot 0.21.1 through 0.24.1 Authorization Bypass via /mcp-connect-composite/ Route
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'}

cvssV4_0

{'score': 8.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-01T14:35:10.239Z

Reserved: 2026-10-01T10:39:47.844Z

Link: CVE-2026-103758

cve-icon Vulnrichment

Updated: 2026-10-01T14:35:05.863Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-01T11:17:26.360

Modified: 2026-10-01T15:17:29.407

Link: CVE-2026-103758

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-01T14:45:10Z

Weaknesses