CVE-2026-49462

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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/nl-portal/nl-portal-backend-libraries/commit/0d2af7665a737e91565352bd4e6124cacaa853b7
https://github.com/nl-portal/nl-portal-backend-libraries/security/advisories/GHSA-9m9w-2vqr-m384

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-11 20:17

Updated : 2026-09-14 17:17

NVD link : CVE-2026-49462

Mitre link : CVE-2026-49462

CVE.ORG link : CVE-2026-49462

JSON object : View

Products Affected

No product.

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

CWE-1188

Initialization of a Resource with an Insecure Default

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