CVE-2026-16498

CRITICAL 10.0

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

CVSS Score

10.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-488
Vendor	hashicorp
Product	tooling
Published	Jul 28, 2026
Last Updated	Jul 28, 2026

Stay Ahead of the Next One

Get instant alerts for hashicorp tooling

Be the first to know when new critical vulnerabilities affecting hashicorp tooling are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

HashiCorp / Tooling

0.3.0 < 1.1.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

This issue was identified by an internal team.