CVE-2026-101084: obot before v0.21.1 Authorization Bypass via /mcp-connect

Severity: critical (CVSS 9.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-27 · updated 2026-09-30
Weakness: CWE-639

Description

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.

Affected products

obot-platform obot: before 0.21.1 — fixed in 0.21.1

How to fix

Upgrade to a fixed version: obot-platform obot 0.21.1. Check the vendor advisory for mitigations.

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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