CVE-2026-49463 NL Portal: Missing per-user authorization on document and decision GraphQL queries in nl-portal-backend-libraries
Authenticated users can access other users' documents and decisions due to missing per-user authorization in GraphQL resolvers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-49463?
CVE-2026-49463 is a medium-severity missing authorization vulnerability in nl.nl-portal:besluiten, published on 11 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
NL Portal Backend Libraries provide backend components for Dutch government portals that interact with residents, customers, suppliers, and partner organizations. The `nl.nl-portal:documenten-api` package through version 3.0.0 and the `nl.nl-portal:besluiten` package from version 1.5.0 through 3.0.0 lack per-user authorization in GraphQL resolvers, allowing an authenticated user to access other users’ document contents, decisions, audit trails, and decision attachments. Version 3.0.1 contains a patch. As a workaround, block the affected document-content and decision-related GraphQL operations at the API gateway or block their GraphQL types entirely.
Which versions are affected by CVE-2026-49463?
4 open source packages ship an affected version, including nl.nl-portal:besluiten and nl.nl-portal:documenten-api.
| Package | Affected | Fixed in |
|---|---|---|
nl.nl-portal:besluiten Maven | From 1.5.0 | 3.0.1 |
nl.nl-portal:besluiten Maven | From 1.5.0 | 3.0.1 |
nl.nl-portal:documenten-api Maven | All versions | 3.0.1 |
nl.nl-portal:documenten-api Maven | All versions | 3.0.1 |
How do I fix CVE-2026-49463?
Upgrade nl.nl-portal:besluiten to 3.0.1 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-49463 being exploited?
There is no known exploitation of CVE-2026-49463 in the wild and no public exploit code.
Sources
Also known as GHSA-qpm9-h556-mwxm.