CVE-2026-11624Public exploitNetwork attack vector

Server takeover via DNS rebinding

Published Jun 13, 2026 · Updated Jun 13, 2026

Origin validation errors in Google MCP Toolbox for Databases before 0.25.0 allow remote attackers to control local servers via DNS rebinding. Streamable HTTP handling accepted arbitrary Origin and Host values because server startup provided no host allowlist for rejecting rebinding requests. A victim must load attacker-controlled web content; successful requests can invoke configured tools to read or write connected data and exercise other exposed functions.

CVSS severity9.4
Critical
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Origin validation errors in Google MCP Toolbox for Databases before 0.25.0 allow remote attackers to control local servers via DNS rebinding. Streamable HTTP handling accepted arbitrary Origin and Host values because server startup provided no host allowlist for rejecting rebinding requests. A victim must load attacker-controlled web content; successful requests can invoke configured tools to read or write connected data and exercise other exposed functions.

The record

CVE
CVE-2026-11624
Published
Jun 13, 2026
Updated
Jun 13, 2026
Vendor
Go standard library
Product
MCP Toolbox for Databases
Classifications
CWE-346, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <0.25.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · MCP Toolbox for Databasesversion=0 <0.25.0

Published CVSS scores

9.4Google Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-346Origin Validation Error
T1189Drive-by Compromise

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo