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nl.nl-portal:app has GraphiQL UI and GraphQL schema introspection enabled by default

CVSS 3.1 5.3 MEDIUMCheck source for fixed versionsKEV status unknown

cve-program · CVE-2026-49462

Published

NL Portal Backend Libraries provide backend components for Dutch government portals that interact with residents, customers, suppliers, and partner organizations. In versions up to and including 3.0.0, deployments using the shipped default configuration exposed two GraphQL developer features without requiring authentication: the GraphiQL playground, an interactive UI for issuing GraphQL queries; and schema introspection, which lets a caller download the full description of every query, mutation, type, and argument the API supports. Anyone who could reach the `/graphiql` endpoint could open the playground in a browser, pull the full schema, and use that to map out the API and craft calls against it. By itself this does not leak user data, but it removes the guesswork from attacking the rest of the API and significantly lowers the bar for finding and exploiting other weaknesses. Version 3.0.1 patches the issue. As a workaround, override the two settings in deployed configuration.

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Affected versions, risk and source history

cve-program · CVE-2026-49462

Published

nl.nl-portal:app

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "nl-portal",
                    "product": "nl.nl-portal:app",
                    "versions": [
                        {
                            "version": "< 3.0.1",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

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