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CVE-2026-54683 is an authorization flaw in NL Portal Backend Libraries documenten-api caused by an incomplete fix for CVE-2026-49463. In affected versions, any authenticated user could retrieve document contents through the REST endpoint GET /api/documentapi//document//content or through the GraphQL getDocumentContent query without a per-document authorization check. As a result, access control was enforced only at the authentication level, not at the individual document level, allowing users to access documents outside their permitted scope if they knew or could obtain a target document identifier. The issue was fully resolved in version 3.0.3.
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