CVE-2026-14869Network attack vector

Bearer-token disclosure via unchecked query parameter

Published Jul 28, 2026 · Updated Jul 28, 2026

SSRF in HashiCorp Terraform MCP Server before 1.1.0 allows remote attackers to disclose its Terraform bearer token through an HTTP request. The streamable-HTTP middleware rejects a client-supplied Terraform address in a header but accepts the same value in a query parameter, then sends the configured token to that address. Any remote client that can reach the streamable-HTTP listener can trigger the disclosure without authentication; stdio-only deployments are unaffected.

CVSS severity8.6
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in HashiCorp Terraform MCP Server before 1.1.0 allows remote attackers to disclose its Terraform bearer token through an HTTP request. The streamable-HTTP middleware rejects a client-supplied Terraform address in a header but accepts the same value in a query parameter, then sends the configured token to that address. Any remote client that can reach the streamable-HTTP listener can trigger the disclosure without authentication; stdio-only deployments are unaffected.

The record

CVE
CVE-2026-14869
Published
Jul 28, 2026
Updated
Jul 28, 2026
Vendor
HashiCorp
Product
Terraform MCP Server
Classifications
CWE-918, T1528
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.3.0 <1.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HashiCorp · Terraform MCP Serverversion=0.3.0 <1.1.0

Published CVSS scores

8.6HashiCorp Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1528Steal Application Access Token

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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