CVE-2026-101084

critical · 9.3

obot versions before v0.21.1 fail to enforce Access Control Rules on the /mcp-connect endpoint, allowing any authenticated user to connect to restricted MCP servers if they possess the server ID. Attackers can bypass authorization checks to access and manipulate sensitive backend systems through MCP tool calls using stored OAuth credentials.

9.3

CVSS

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EPSS (exploit prob.)

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EPSS percentile

2026-09-27

Published

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE-639

References

https://github.com/obot-platform/obot/security/advisories/GHSA-vw82-7fv8-r6gp
https://www.vulncheck.com/advisories/obot-before-0.21.1-authorization-bypass-via-mcp-connect

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-101084