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Advisory record · GHSA-76g7-m3xw-x9gr

MCP Toolbox for Databases has an Origin Validation Error

CVSS 9.4 CriticalCriticalEPSS 0.0022 · 12th percentile

Critical, because:

  • CVSS score 9.4: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 13 Jun 2026, 12:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/googleapis/mcp-toolboxGo<0.25.00.25.0
Identifiers
GHSA-76g7-m3xw-x9gr · CVE-2026-11624 · GO-2026-6288
Weakness (CWE)
CWE-346
Tags
Published
13 Jun 2026
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

MCP Toolbox for Databases (Go module github.com/googleapis/mcp-toolbox) before 0.25.0 has an origin validation error that leaves it open to DNS rebinding attacks, because users had no way to validate the origin's host. An attacker who can reach the server over the network may be able to exploit this, though the source gives few details on the exact conditions. Upgrade to version 0.25.0 or later, then set the new --allowed-hosts and --allowed-origins flags to restrict access instead of the default "*".

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.4 Critical 4.0 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 CNA (Google)
  • CISA KEV Not listed.
  • EPSS 0.0022, the 12th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:14 UTC First seen by agentprime
  2. 31 Oct 2026, 14:14 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.