CVE-2026-16498

CriticalCVSS 10.0/10Last modified Oct 23, 2026

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.

Metrics

CVSS 3.1 10.0/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L

Weakness enumeration

CWE-488

Affected software

Vendor	Product	Versions
HashiCorp	Tooling	>= 0.3.0, < 1.1.0

References

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

Timeline

Published: Jul 28, 2026
Last modified: Oct 23, 2026
NVD status: Deferred

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