# 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.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 11 Sep 2026
- **Updated:** 11 Sep 2026
- **Also known as:** GHSA-qpm9-h556-mwxm

## 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.

Weakness: CWE-285 (Improper Authorization), CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## 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 | Ecosystem | 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.

## Is CVE-2026-49463 being exploited?

There is no known exploitation of CVE-2026-49463 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-49463 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-49463 in the wild and no public exploit code.

Affected packages and fixed versions:
- nl.nl-portal:besluiten (Maven): affected from 1.5.0; fixed in 3.0.1
- nl.nl-portal:besluiten (Maven): affected from 1.5.0; fixed in 3.0.1
- nl.nl-portal:documenten-api (Maven): affected all versions; fixed in 3.0.1
- nl.nl-portal:documenten-api (Maven): affected all versions; fixed in 3.0.1

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-49463/ (Markdown: https://insights.sbomify.com/CVE-2026-49463/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-49463
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-49463
- OSV: https://osv.dev/vulnerability/CVE-2026-49463

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-49463/
Summaries are generated and may contain mistakes; the official description above is the record.