CVE-2026-103758

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

State: Published
Severity: 8.6 High
Published: Oct 1, 2026
Updated: Oct 1, 2026
Reserved: Oct 1, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	8.6 High	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	VulnCheck
3.1	8.1 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N	VulnCheck

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
obotobot-platform	0.21.1 through 0.24.1Affected

References

GitHub Security Advisory (GHSA-6fwv-3h4c-37j9)vendor-advisory
VulnCheck Advisory: Obot 0.21.1 through 0.24.1 Authorization Bypass via /mcp-connect-composite/ Routethird-party-advisory

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