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OpenAdvisories
Critical · 9.4 CVE-2026-11624 EUVD-2026-36650GHSA-76g7-m3xw-x9grGO-2026-6288

MCP Toolbox for Databases has an Origin Validation Error

Published Jun 13, 2026 · Updated Jun 15, 2026 · Assigned by Google

Description

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.

Affected products

VendorProductAffectedFixed
Google MCP Toolbox for Databases < 0.25.0 0.25.0

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
SLES for SAP 16.0 govulncheck-vulndb 0.0.20260827T195228-160000.1.1 SUSE-SU-2026:23625-1
SLES 16.0 govulncheck-vulndb 0.0.20260827T195228-160000.1.1 SUSE-SU-2026:23625-1
ReleasePackageFixed inAdvisory
openSUSE Leap 16.0 govulncheck-vulndb 0.0.20260827T195228-160000.1.1 openSUSE-SU-2026:21761-1

Affected packages

EcosystemPackageAffectedFixedRecord
Go github.com/googleapis/genai-toolbox < 0.25.0 0.25.0 GO-2026-6288
Go github.com/googleapis/mcp-toolbox < 0.25.0 0.25.0 GHSA-76g7-m3xw-x9gr

Advisories 2

References