CVE-2026-11624: Github.com/googleapis/mcp toolbox MCP Toolbox For Databases Has Vulnerability

CRITICAL
Advisory Identifier: GHSA-76g7-m3xw-x9gr
Share
CWE-346
Published
Advisory Summary

CVE-2026-11624 is a CRITICAL mcp toolbox for databases has vulnerability (CWE-346: Origin Validation Error) affecting Github.com/googleapis/mcp toolbox libraries in the Go ecosystem. The issue involves mcp toolbox for databases has an origin validation error. Remediation is available by upgrading affected packages to version 0.25.0.

CVE-2026-11624 at a Glance

CVE Identifier CVE-2026-11624
GHSA Identifier GHSA-76g7-m3xw-x9gr
Severity CRITICAL
CVSS v3.1 Base Score N/A
CWE Classification CWE-346: Origin Validation Error
Affected Product Github.com/googleapis/mcp toolbox
Package Ecosystem Go
Published Date
Last Updated

How to Fix CVE-2026-11624

To remediate this vulnerability, upgrade all affected Github.com/googleapis/mcp toolbox dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/googleapis/mcp-toolbox fixed: 0.25.0 
Upgrade github.com/googleapis/mcp-toolbox to 0.25.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/googleapis/mcp-toolbox

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-11624, inspect your project dependencies for Github.com/googleapis/mcp toolbox:

inspect dependencies for github.com/googleapis/mcp-toolbox

Analyze the terminal output to locate any version of Github.com/googleapis/mcp toolbox in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.25.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-346: Origin Validation Error, where the product does not properly verify that the source of data or communication is valid. In Github.com/googleapis/mcp toolbox, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

The Model Context Protocol has a security warning advising servers to validate the "Origin" header on all incoming connections to prevent DNS rebinding attacks. Prior to the v0.25.0 release, users had no way to validate the origin's host. In v0.25.0, a new "--allowed-hosts" flag was introduced alongside the existing "--allowed-origins" flag, enabling users to specify permitted hosts at server startup. Both flags default to "*", allowing users to implement strict access controls as needed without breaking existing setups. If either flag is set to "*", the server will output a startup warning about potential vulnerabilities. Documentation has also been updated to highlight these security considerations.

CVE-2026-11624 Affected Github.com/googleapis/mcp toolbox Versions

1 component(s)
Fixed Versions:
0.25.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/googleapis/mcp-toolbox
golang/github.com/googleapis/mcp-toolbox
Go
< 0.25.0
0.25.0

References

NVD — CVE-2026-11624 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-11624
Github.com/googleapis/mcp toolbox Source Repository REPOSITORY
https://github.com/googleapis/mcp-toolbox/issues/3113
Github.com/googleapis/mcp toolbox Source Repository REPOSITORY
https://github.com/googleapis/mcp-toolbox/pull/2254
Security Fix Commit FIX COMMIT
https://github.com/googleapis/mcp-toolbox/commit/17b41f64531b8fe417c28ada45d1992ba430dc1b
Github.com/googleapis/mcp toolbox Source Repository REPOSITORY
https://github.com/googleapis/mcp-toolbox

Frequently Asked Questions

What is CVE-2026-11624?
CVE-2026-11624 is a security vulnerability in Github.com/googleapis/mcp toolbox involving MCP Toolbox for Databases has an Origin Validation Error under CWE-346: Origin Validation Error.
Which Github.com/googleapis/mcp toolbox versions are affected?
Affected versions include releases prior to 0.25.0 across affected packages: github.com/googleapis/mcp-toolbox.
What version fixes CVE-2026-11624?
Upgrading to 0.25.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/googleapis/mcp-toolbox affected?
Yes, github.com/googleapis/mcp-toolbox is affected in releases prior to 0.25.0. Upgrade your dependency to 0.25.0 or later.
What CWE is associated with CVE-2026-11624?
CVE-2026-11624 is classified under CWE-346: Origin Validation Error (The product does not properly verify that the source of data or communication is valid.).
How can I check Go dependencies for CVE-2026-11624?
Run the dependency tree command: 'inspect dependencies for github.com/googleapis/mcp-toolbox'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-76g7-m3xw-x9gr",
  "modified" : "2026-08-24T22:06:17Z",
  "published" : "2026-06-13T12:31:25Z",
  "aliases" : [ "CVE-2026-11624" ],
  "summary" : "MCP Toolbox for Databases has an Origin Validation Error",
  "details" : "The Model Context Protocol has a security warning advising servers to validate the \"Origin\" header on all incoming connections to prevent DNS rebinding attacks. Prior to the v0.25.0 release, users had no way to validate the origin's host. In v0.25.0, a new \"--allowed-hosts\" flag was introduced alongside the existing \"--allowed-origins\" flag, enabling users to specify permitted hosts at server startup. Both flags default to \"*\", allowing users to implement strict access controls as needed without breaking existing setups. If either flag is set to \"*\", the server will output a startup warning about potential vulnerabilities. Documentation has also been updated to highlight these security considerations.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/googleapis/mcp-toolbox"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.25.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-11624"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/googleapis/mcp-toolbox/issues/3113"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/googleapis/mcp-toolbox/pull/2254"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/googleapis/mcp-toolbox/commit/17b41f64531b8fe417c28ada45d1992ba430dc1b"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/googleapis/mcp-toolbox"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-346" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-24T22:06:17Z",
    "nvd_published_at" : "2026-06-13T10:16:17Z"
  }
}