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GHSA-7pf3-8xx7-rvhf

MCP Toolbox for Databases vulnerable to DNS rebinding attacks

Source: GitHub Advisory Database (reviewed) Critical CVE-2026-9739

Packages

EcosystemPackageAffectedFixed in
Go github.com/googleapis/mcp-toolbox < 1.2.0 1.2.0

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.