GHSA-7pf3-8xx7-rvhf

Source

https://github.com/advisories/GHSA-7pf3-8xx7-rvhf

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-7pf3-8xx7-rvhf/GHSA-7pf3-8xx7-rvhf.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-7pf3-8xx7-rvhf

Aliases

CVE-2026-9739
GO-2026-5870

Published

2026-05-28T00:30:29Z

Modified

2026-07-07T16:11:35Z

Severity

9.4 (Critical) CVSS_V4 - 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 Calculator

Summary

MCP Toolbox for Databases vulnerable to DNS rebinding attacks

Details

Vulnerable to DNS rebinding attacks when using SSE (http://b/499408790). During the beta phase, we implemented allowed-origins and allowed-hosts flags to align with MCP security guidelines. However, the hardcoded Access-Control-Allow-Origin: * header in the SSE initialization handler was inadvertently retained. This vulnerability specifically impacts users connecting via Toolbox using SSE under specification v2024-11-05.

Database specific

{
    "cwe_ids":  [
        "CWE-942"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-07-01T20:54:22Z",
    "nvd_published_at":  "2026-05-27T23:16:48Z",
    "severity":  "CRITICAL"
}

References

Affected packages

Go / github.com/googleapis/mcp-toolbox

Package

Name: github.com/googleapis/mcp-toolbox; View open source insights on deps.dev
Purl: pkg:golang/github.com/googleapis/mcp-toolbox

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.2.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-7pf3-8xx7-rvhf/GHSA-7pf3-8xx7-rvhf.json"