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CVE-2026-54683— NL Portal Backend Libraries: Document contents remained downloadable by any logged-in user until 3.0.3 (incomplete fix of CVE-2026-49463)

Quick assessment

Affected
nl-portal nl-portal-backend-libraries
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

NL Portal 后端库为荷兰政府门户网站提供后端组件，用于与居民、客户、供应商及合作伙伴组织进行交互。在 3.0.3 版本之前，getDocumentContent GraphQL 查询和 GET /api/documentapi/{documentapi}/document/{documentId}/content REST 路由均存在安全缺陷，允许任何经过身份验证的门户用户无需检查其是否拥有该文档或与该文档存在其他授权关系即可检索文档内容。拥有有效登录凭据的攻击者，若能获取他人的文档标识符，便可读取该文档的

CVSS 6.5 · Medium

Possible ATT&CK Techniques 2 AI

T1530.001 T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
nl-portal nl-portal-backend-libraries < 3.0.3 affected
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I. Basic Information for CVE-2026-54683

Vulnerability Information
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Vulnerability Title
NL Portal Backend Libraries: Document contents remained downloadable by any logged-in user until 3.0.3 (incomplete fix of CVE-2026-49463)
Source: CVE Program / CVE List V5
Vulnerability Description
NL Portal Backend Libraries provide backend components for Dutch government portals that interact with residents, customers, suppliers, and partner organizations. Prior to 3.0.3, both the getDocumentContent GraphQL query and GET /api/documentapi/{documentapi}/document/{documentId}/content REST route allow any authenticated portal user to retrieve a document without checking ownership of or another authorized relationship to it. A user with a valid login and another person's document identifier can read that document's contents, which may include sensitive personal information. Document identifiers are random and difficult to guess, but they can leak through other channels. This issue is fixed in version 3.0.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
nl-portal nl-portal-backend-libraries < 3.0.3 -

II. Public POCs for CVE-2026-54683

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III. Intelligence Information for CVE-2026-54683

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Patches & Fixes for CVE-2026-54683 (2)

Vendor Advisories for CVE-2026-54683 (1)

Vendor Pages for CVE-2026-54683 (1)

IV. Related Vulnerabilities

Same product: nl-portal-backend-libraries
Same vendor: nl-portal
Same weakness: CWE-285

V. Comments for CVE-2026-54683

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