# CVE-2026-16496

## Summary

- **CVE ID:** CVE-2026-16496
- **Severity:** HIGH
- **CVSS Score:** 8.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L)
- **CWE:** CWE-384
- **Published:** Jul 28, 2026
- **Last Modified:** Jul 28, 2026

## 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

- HashiCorp — Tooling (0.3.0)

## References

- [CNA](https://discuss.hashicorp.com/t/hcsec-2026-23-multiple-vulnerabilities-impacting-hashicorp-terraform-mcp-server/77606)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.37%
- **EPSS Percentile:** 30.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._