CVE-2026-101084

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.

CVSS 4.0

9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

CVSS 3.1

9.6CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 27% of CVEs (scores of 2026-10-25)

CWE

CWE-639

Published

2026-09-27

Modified

2026-09-30

Record from

the NVD, synced 2026-10-19

Packages (OSV)

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
• https://github.com/obot-platform/obot/security/advisories/GHSA-vw82-7fv8-r6gp

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