CVE-2026-103758

Obot 0.21.1 through 0.24.1 Authorization Bypass via /mcp-connect-composite/ Route

Published Oct 1, 2026 CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

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

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 1, 2026, 2:35 PM
Reserved
Oct 1, 2026, 10:39 AM
Status
Awaiting Analysis
Published
Oct 1, 2026, 11:17 AM
Modified
Oct 1, 2026, 3:17 PM