CVE-2026-16498

CRITICAL

terraform-mcp-server vulnerable to cross-tenant credential reuse in streamable-HTTP stateless mode

Title source: cna

Description

The terraform-mcp-server before version 1.1.0 is vulnerable to a cross-tenant credential reuse issue in the streamable-HTTP stateless transport mode that may allow one user's Terraform token to be used to execute tool calls on behalf of subsequent users. This vulnerability, CVE-2026-16498, is fixed in terraform-mcp-server 1.1.0.

References (1)

Core 1

Core References

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

Scores

CVSS v3 10.0

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact total

Details

CWE

CWE-488

Status published

Products (1)

HashiCorp/Tooling 0.3.0 - 1.1.0

Published Jul 28, 2026

Tracked Since Jul 29, 2026