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CVE-2026-49464

HighCVSS 8.1 / 10
Published Sep 11, 2026·Last modified Sep 12, 2026
Affected Components(12)
nl-portal/nl-portal-backend-libraries
1.0.2.RELEASE
nl-portal/nl-portal-backend-libraries
1.0.6.RELEASE
nl-portal/nl-portal-backend-libraries
1.0.1.RELEASE
1 / 4
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

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Risk Scores
Base Score
8.1

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data.

Threat Intelligence
7.4

Exploitation activity has been observed. Apply available patches or mitigations urgently.

EPSS
0.35%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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