Skip to content
Patch Next
Sign inAdd to your agent

← Actionable
Critical, CVSS 9.4amended

MCP Toolbox for Databases has an Origin Validation Error

CVE-2026-11624GHSA-76g7-m3xw-x9gr

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (github.com/googleapis/genai-toolbox 0.25.0; github.com/googleapis/mcp-toolbox 0.25.0), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

Add to your agent

Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
9.4 · 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 · score source
EPSS
  • CVE-2026-11624: 0.22% estimated exploitation activity in the next 30 days; percentile 12.52 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

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.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-76g7-m3xw-x9gr

  2. Revision 2 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  3. Revision 1 · created ·

    Published from osv record GO-2026-6288

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-11624

Advisory: MCP Toolbox for Databases has an Origin Validation Error
IDs: CVE-2026-11624, GHSA-76g7-m3xw-x9gr
Record: https://patchnext.com/advisories/cve-2026-11624 (revision 3, source checked 26 Oct 2026, 15:28 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.4)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/googleapis/genai-toolbox 0.25.0; github.com/googleapis/mcp-toolbox 0.25.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/googleapis/genai-toolbox: affected < 0.25.0; fixed in 0.25.0
- Go github.com/googleapis/mcp-toolbox: affected < 0.25.0; fixed in 0.25.0

## Suggested inspection (read-only)
- Go github.com/googleapis/genai-toolbox: check the installed version with your package manager.
- Go github.com/googleapis/mcp-toolbox: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/googleapis/genai-toolbox, github.com/googleapis/mcp-toolbox.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GO-2026-6288 (OSV record GO-2026-6288 lists affected ranges: Go github.com/googleapis/genai-toolbox >=0 <0.25.0 (fixed))
- Verified: https://github.com/advisories/GHSA-76g7-m3xw-x9gr (GitHub-reviewed advisory GHSA-76g7-m3xw-x9gr lists affected ranges: Go github.com/googleapis/mcp-toolbox >=0 <0.25.0)

Commands are suggestions: review each one before running it.

Loading voting…