CVE-2026-49464: CWE-639: Authorization Bypass Through User-Controlled Key in nl-portal nl-portal-backend-libraries
NL Portal Backend Libraries provide backend components for Dutch government portals that interact with residents, customers, suppliers, and partner organizations. The `nl.nl-portal:taak` package from version 1.5.0 through 3.0.0 fails to verify ownership when processing the `submitTaakV2` GraphQL mutation, allowing an authenticated user who knows or guesses another user’s task ID to read its form data, overwrite its submitted data, and mark the task as completed. Version 3.0.1 contains a patch. As a workaround, block the `submitTaakV2` mutation at the API gateway or restrict the `/graphql` endpoint to trusted networks
CVE-2026-49464: CWE-639: Authorization Bypass Through User-Controlled Key in nl-portal nl-portal-backend-libraries
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:taak` package from version 1.5.0 through 3.0.0 fails to verify ownership when processing the `submitTaakV2` GraphQL mutation, allowing an authenticated user who knows or guesses another user’s task ID to read its form data, overwrite its submitted data, and mark the task as completed. Version 3.0.1 contains a patch. As a workaround, block the `submitTaakV2` mutation at the API gateway or restrict the `/graphql` endpoint to trusted networks
CVSS v3.1
Score 8.1high
Affected software
nl-portal
nl-portal-backend-libraries
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-30T04:17:43.094Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa468f391cc7f3848a3f587
Added to database: 09/11/2026, 20:47:47 UTC
Last updated: 09/11/2026, 20:47:47 UTC
Views: 1
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