CVE-2026-16328Network attack vector

Token disclosure via unrestricted backend address override

Published Jul 29, 2026 · Updated Jul 29, 2026

SSRF in HashiCorp Consul MCP Server 0.1.0 through 0.1.3 allows remote attackers to redirect Consul API traffic via a request header. The per-request address override accepts an unrestricted client-supplied destination and forwards configured Consul credentials to that endpoint. Exposure requires StreamableHTTP access by an untrusted client; credential disclosure additionally requires a Consul token in the server environment.

CVSS severity8.6
High
EPSS probability0.23%
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 Consul MCP Server 0.1.0 through 0.1.3 allows remote attackers to redirect Consul API traffic via a request header. The per-request address override accepts an unrestricted client-supplied destination and forwards configured Consul credentials to that endpoint. Exposure requires StreamableHTTP access by an untrusted client; credential disclosure additionally requires a Consul token in the server environment.

The record

CVE
CVE-2026-16328
Published
Jul 29, 2026
Updated
Jul 29, 2026
Vendor
HashiCorp
Product
Consul MCP Server
Classifications
CWE-918, CAPEC-664, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 29, 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=0.1.0 <0.1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HashiCorp · Consul MCP Serverversion=0.1.0 <0.1.4

Published CVSS scores

8.6HashiCorpCVSS: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)
CAPEC-664Server Side Request Forgery
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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