CVE-2026-54683 NL Portal Backend Libraries: Document contents remained downloadable by any logged-in user (incomplete fix of CVE-2026-49463)
Authenticated users can access other users' documents via GraphQL or REST endpoints without ownership checks, exposing sensitive personal information.
- 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-2026-54683?
CVE-2026-54683 is a medium-severity missing authorization vulnerability in nl-portal-backend-libraries, published on 15 Oct 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. Prior to 3.0.3, both the getDocumentContent GraphQL query and GET /api/documentapi/{documentapi}/document/{documentId}/content REST route allow any authenticated portal user to retrieve a document without checking ownership of or another authorized relationship to it. A user with a valid login and another person's document identifier can read that document's contents, which may include sensitive personal information. Document identifiers are random and difficult to guess, but they can leak through other channels. This issue is fixed in version 3.0.3.
Which versions are affected by CVE-2026-54683?
2 open source packages ship an affected version, including nl.nl-portal:documenten-api.
| Package | Affected | Fixed in |
|---|---|---|
nl.nl-portal:documenten-api Maven | All versions | 3.0.3 |
nl.nl-portal:documenten-api Maven | All versions | 3.0.3 |
How do I fix CVE-2026-54683?
Upgrade nl.nl-portal:documenten-api to 3.0.3 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-54683 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-54683 exists.
Sources
Also known as GHSA-jr45-52cw-69h5.