CVE-2026-101084
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published .
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Weakness classification (CWE)
References
- github.com/obot-platform/obot/security/advisories/GHSA-vw82-7fv8-r6gp (vendor-advisory)
- www.vulncheck.com/advisories/obot-before-0.21.1-authorization-bypass-via-mcp-co… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-101084?
- CVE-2026-101084 is a critical-severity vulnerability, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 9.6/10. Published 2026-09-27.
- How severe is CVE-2026-101084?
- Critical severity. CVSS v3 base score is 9.6 out of 10.