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
Published: 2026-09-11
Score: 8.1 High
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-6h3c-r723-7fx3 NL Portal: IDOR allows any authenticated user to complete and tamper with another user's taak
History

Tue, 15 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Sun, 13 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Nl-portal
Nl-portal nl-portal-backend-libraries
Vendors & Products Nl-portal
Nl-portal nl-portal-backend-libraries

Fri, 11 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
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
Title NL Portal: IDOR allows any authenticated user to complete and tamper with another user's taak
Weaknesses CWE-639
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'}


Subscriptions

Nl-portal Nl-portal-backend-libraries
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-15T16:36:50.488Z

Reserved: 2026-05-30T04:17:43.094Z

Link: CVE-2026-49464

cve-icon Vulnrichment

Updated: 2026-09-15T16:36:44.115Z

cve-icon NVD

Status : Received

Published: 2026-09-11T21:17:10.523

Modified: 2026-09-15T17:17:16.253

Link: CVE-2026-49464

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-15T20:15:14Z

Weaknesses