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CVE-2026-54657— Open Zaak: /zaken/_zoek and /enkelvoudiginformatieobjecten/_zoek endpoints do not filter result lists based on authorizations linked to token

Quick assessment

Affected
open-zaak open-zaak
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.

Open Zaak 是一个面向荷兰案件处理工作的开源数据与服务层。在版本 1.0.0 至 1.27.2、1.28.2 和 1.29.0 中，POST 搜索端点 和 未根据请求令牌所关联的授权信息对结果查询集进行过滤。因此，持有有效 或 令牌的调用方，可以检索超出该令牌授权类型或保密级别的案件或文档元数据。文档搜索需要已知 UUID，而文档内容仍受独立的下载授权保护。该问题已在版本 1.27.2、1.28.2 和 1.29.0 中修复。

CVSS 6.5 · Medium

Affected Version Matrix 2

VendorProduct Version RangeStatus
open-zaak open-zaak >= 1.0.0, < 1.27.2 affected
>= 1.28.0, < 1.28.2 affected
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I. Basic Information for CVE-2026-54657

Vulnerability Information
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Vulnerability Title
Open Zaak: /zaken/_zoek and /enkelvoudiginformatieobjecten/_zoek endpoints do not filter result lists based on authorizations linked to token
Source: CVE Program / CVE List V5
Vulnerability Description
Open Zaak is an open-source data and services layer for Dutch case-oriented working. From 1.0.0 until 1.27.2, 1.28.2, and 1.29.0, the POST search endpoints /zaken/api/v1/zaken/_zoek and /documenten/api/v1/enkelvoudiginformatieobjecten/_zoek do not filter result querysets according to the authorizations associated with the request token. A caller with a valid zaken.lezen or documenten.lezen token can therefore retrieve case or document metadata outside the token's authorized types or confidentiality levels. Document searches require known UUIDs, and document content remains protected by separate download authorization. This issue is fixed in versions 1.27.2, 1.28.2, and 1.29.0.
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
open-zaak open-zaak >= 1.0.0, < 1.27.2 -

II. Public POCs for CVE-2026-54657

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III. Intelligence Information for CVE-2026-54657

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Patches & Fixes for CVE-2026-54657 (3)

Vendor Advisories for CVE-2026-54657 (1)

Vendor Pages for CVE-2026-54657 (2)

IV. Related Vulnerabilities

Same product: open-zaak
Same vendor: open-zaak
Same weakness: CWE-285

V. Comments for CVE-2026-54657

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