Description
The terraform-mcp-server before version 1.1.0 is vulnerable to an authorization bypass in the streamable-HTTP stateful transport mode that may allow a user who obtains another user's MCP session ID to have their tool calls executed using that user's Terraform credentials. This vulnerability, CVE-2026-16496, is fixed in terraform-mcp-server 1.1.0.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| HashiCorp | Tooling | 0.3.0 – < 1.1.0 | 1.1.0 |
Advisories 1
- WID-SEC-2026-2572 Hashicorp Terraform MCP Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 28, 2026