{"id":"CVE-2026-49464","title":"NL Portal Backend Libraries provide backend components for Dutch government portals that interact with residents, customers, suppliers, and partner organizations","summary":"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 …","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-639"],"vendor":"nl-portal","product":"nl-portal-backend-libraries","affected":["nl-portal-backend-libraries >= 1.5.0, < 3.0.1"],"patched":["nl.nl-portal:taak 3.0.1"],"published":"2026-09-11","updated":"2026-09-15","sourceUpdated":"2026-09-15T17:17:16.253","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-49464","references":[{"url":"https://github.com/nl-portal/nl-portal-backend-libraries/security/advisories/GHSA-6h3c-r723-7fx3","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-6h3c-r723-7fx3"}],"tags":["nvd","cve.org","ghsa","maven"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-15T16:35:22.103984Z"},"epss":0.00201,"epssPercentile":0.10262,"aliases":["GHSA-6h3c-r723-7fx3"],"ecosystem":"maven","ingestedAt":"2026-07-08T21:47:02.931Z","slug":"CVE-2026-49464","body":"## Overview\n\nNL 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\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-49464)\n\nAffected packages:\n\n- `nl.nl-portal:taak >= 1.5.0, <= 3.0.0`\n\nPatched in:\n\n- `nl.nl-portal:taak 3.0.1`\n\nSource: https://github.com/advisories/GHSA-6h3c-r723-7fx3","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}