CVE-2026-103758 PUBLISHED

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

Assigner: VulnCheck
Reserved: 01.10.2026 Published: 01.10.2026 Updated: 01.10.2026

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.

CVSS 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
CVSS Score: 8.6

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS Score: 8.1

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	obot-platform
Product	obot
Versions	Default: unaffected affected from 0.21.1 to 0.24.1 (incl.)

CVE-2026-103758 PUBLISHED

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

Metrics

Product Status

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Problem Types