CVE-2026-16496

CVSS Score & Metrics

Base Score

8.9 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L                                    

Vulnerability 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.

Vulnerability Details

Published Date

July 28, 2026

Last Modified

July 28, 2026

CWE ID

CWE-384

Source

NVD

Vendor

HashiCorp

Product

Tooling

External References

https://discuss.hashicorp.com/t/hcsec-2026-23-multiple-vulnerabilities-impacting-hashicorp-terraform-mcp-server/77606

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