CVE-2026-16328

Received Received - Intake

Consul Address Override in consul-mcp-server

Publication date: 2026-07-29

Last updated on: 2026-07-29

Assigner: HashiCorp Inc.

Description

In consul-mcp-server, versions 0.1.0 up to 0.1.3 did not restrict how the Consul backend address was supplied, allowing a connected client to override the server's configured Consul address via a request header. This may allow a malicious client to redirect the server's Consul API traffic to an attacker-controlled endpoint, potentially exfiltrating the Consul token configured on the server. This vulnerability, CVE-2026-16328, is fixed in consul-mcp-server 0.1.4.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-07-29

Last Modified

2026-07-29

Generated

2026-08-19

AI Q&A

2026-07-30

EPSS Evaluated

2026-08-18

NVD

CVE-2026-16328

Affected Vendors & Products

Vendor	Product	Version / Range
hashicorp	consul_mcp_server	to 0.1.3 (inc)
hashicorp	consul_mcp_server	0.1.4

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-918	The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Attack-Flow Graph

Executive Summary

In consul-mcp-server versions 0.1.0 to 0.1.3, the software did not properly restrict the Consul backend address supplied by clients. This allowed a connected client to override the server's configured Consul address using a request header.

Detection Guidance

Check if consul-mcp-server is running versions 0.1.0 to 0.1.3. Inspect server logs for unusual requests with overridden Consul backend addresses. Monitor network traffic for unexpected connections to untrusted endpoints.

Impact Analysis

A malicious client could redirect the server's Consul API traffic to an attacker-controlled endpoint. This could lead to the exfiltration of the Consul token configured on the server, potentially compromising sensitive data and system access.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, which may violate compliance requirements such as GDPR or HIPAA. Exfiltration of tokens or data could result in data breaches, triggering legal and regulatory penalties.

Mitigation Strategies

Upgrade consul-mcp-server to version 0.1.4 or later immediately. Review and restrict client access to the server. Rotate any exposed Consul tokens as a precaution.

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