CVE-2026-16496

high

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.

References

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

Details

Source: Mitre, NVD

Published: 2026-07-28

Updated: 2026-07-28

Risk Information

CVSS v2

Base Score: 7.3

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:P

Severity: High

CVSS v3

Base Score: 8.9

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