Feed/CVE-2026-9739
CVE-2026-9739CRITICALCVSS 0.0

MCP Toolbox for Databases vulnerable to DNS rebinding attacks

Published May 28, 2026·Updated Jul 1, 2026

NVD Description

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.

Affected Packages (1)

github.com/googleapis/mcp-toolboxGO
Fixed in 1.2.0

References

View on NVD Search GitHub Search Google

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