Vulnerability · Published Sep 27, 2026 · Assigned by VulnCheck

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

Critical 9.6

In plain English

A critical-severity authorization bypass via user-controlled key in obot from obot-platform. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.6Critical

Exploit odds (30 days)0.3%top 71.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/obot-platform/obot	0.21.1	GHSA-vw82-7fv8-r6gp
Go	github.com/obot-platform/obot	0.21.1	GO-2026-5678

Affected products (as reported)

Vendor	Product	Versions
obot-platform	obot	0 – before 0.21.1

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

References

GitHub Security Advisory (GHSA-vw82-7fv8-r6gp) vendor-advisory
VulnCheck Advisory: obot before v0.21.1 Authorization Bypass via /mcp-connect third-party-advisory