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.
Published: 2026-10-01
Score: 8.6 High
EPSS: n/a
KEV: No
AI Analysis

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Remediation

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Advisories

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History

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'}

Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-01T10:42:26.638Z

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

Link: CVE-2026-103758

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

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

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

Link: CVE-2026-103758

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses