VDB-383955 · CVE-2026-16498 · WID-SEC-2026-2572

HashiCorp terraform-mcp-server up to 1.0.9 Streamable-HTTP Stateless Transport Mode state issue

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.0	$0-$5k	4.77

Summaryinfo

A vulnerability was found in HashiCorp terraform-mcp-server up to 1.0.9. It has been classified as critical. Affected by this vulnerability is an unknown functionality of the component Streamable-HTTP Stateless Transport Mode. Performing a manipulation results in state issue. This vulnerability is known as CVE-2026-16498. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in HashiCorp terraform-mcp-server up to 1.0.9. It has been classified as critical. This affects an unknown code block of the component Streamable-HTTP Stateless Transport Mode. The manipulation with an unknown input leads to a state issue vulnerability. CWE is classifying the issue as CWE-371. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at discuss.hashicorp.com. This vulnerability is uniquely identified as CVE-2026-16498 since 07/21/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 1.1.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-2572). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

Hashicorp Terraform

Productinfo

Type

Artificial Intelligence Software

Vendor

HashiCorp

Name

terraform-mcp-server

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: State issue
CWE: CWE-371
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: terraform-mcp-server 1.1.0

Timelineinfo

07/21/2026 CVE reserved
07/28/2026 +7 days Advisory disclosed
07/28/2026 +0 days VulDB entry created
07/29/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: discuss.hashicorp.com
Status: Confirmed

CVE: CVE-2026-16498 (🔒)
GCVE (CVE): GCVE-0-2026-16498
GCVE (VulDB): GCVE-100-383955
CERT Bund: WID-SEC-2026-2572 - Hashicorp Terraform MCP Server: Mehrere Schwachstellen

Entryinfo

Created: 07/28/2026 20:34
Updated: 07/29/2026 14:34
Changes: 07/28/2026 20:34 (55), 07/29/2026 14:34 (7)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.