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Obot has an authorization bypass in /mcp-connect/{id} that allows any authenticated user to use any registered MCP server

Type: advisorySource: OSV1 source record

## Summary If you have the MCP Server ID, you can connect to the MCP server even if you don't have permissions to the server. The MCP gateway endpoint `/mcp-connect/{mcp_id}` does not enforce Access Control Rules (ACRs). Any authenticated Obot user who possesses an MCP Server ID can connect to that server through the gateway — including making tool calls — regardless of whether they are a member of any MCP Registry that grants access to the server. In practice this means any User can fully use MCP servers that the administrator believed were restricted to specific groups. ## Severity Reporter estimate: **Critical**. | CVSS 3.1 metric | Value | |---|---| | Attack Vector | Network | | Attack Complexity | Low | | Privileges Required | Low (authenticated Obot user, any role ≥ Basic) | | User Interaction | None | | Scope | Changed (Obot authorization bypass enables access to data and operations on an upstream third-party service via Obot's stored OAuth credentials) | | Confidentiality | High | | Integrity | High (many MCP servers expose write tools — e.g. `updateEmployee`, `submitTimeoffRequest`, ticket creation, file writes) | | Availability | None | | **Vector** | `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N` | | **Score** | **9.3 / Critical** | The upstream impact depends on which MCP servers are deployed and what scope their stored credentials hold; the bound is "everything the platform's stored OAuth/API credentials can reach." ## Affected Versions Confirmed on `obot v0.21.0

Announced Source revision 1
Original source ↗

GHSA-vw82-7fv8-r6gp

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:GHSA-vw82-7fv8-r6gp

github.com/obot-platform/obot

Source reference: /affected/0/package/name

Affected versions
Not stated in this record
Fixed versions
0.21.1

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "SEMVER",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0.21.1"
          }
        ]
      }
    ],
    "package": {
      "name": "github.com/obot-platform/obot",
      "purl": "pkg:golang/github.com/obot-platform/obot",
      "ecosystem": "Go"
    },
    "database_specific": {
      "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-vw82-7fv8-r6gp/GHSA-vw82-7fv8-r6gp.json",
      "last_known_affected_version_range": "<= 0.21.0"
    }
  }
]
Related CVEs
CVE-2026-101084

Source reference: /aliases

Publisher severity

critical

Source reference: /database_specific/severity

Linked CVE context

These ratings describe the referenced vulnerabilities and products. They are not a severity rating for every application using this dependency.

CVE-2026-101084 · Critical

obot

Event
#22423 · Revision 1
Added to Heist Feed
Publisher date
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