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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-54657
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-16 16:18:43 UTC
Updated2026-10-16 20:04:29 UTC
DescriptionOpen 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Problem Types: CWE-285 | CWE-639 | CWE-285 CWE-285: Improper Authorization | CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Open-zaak Open-zaak affected >= 1.0.0, < 1.27.2 Not specified
CNA Open-zaak Open-zaak affected >= 1.28.0, < 1.28.2 Not specified

References

ReferenceSourceLinkTags
github.com/open-zaak/open-zaak/releases/tag/1.27.2 [email protected] github.com
github.com/open-zaak/open-zaak/commit/15456f1a0ef4b0abf1b1c0e3a16c99c154... [email protected] github.com
github.com/open-zaak/open-zaak/releases/tag/1.29.0 [email protected] github.com
github.com/open-zaak/open-zaak/releases/tag/1.28.2 [email protected] github.com
github.com/open-zaak/open-zaak/commit/d3869af98c60570782f867bab3e1d14fd8... [email protected] github.com
github.com/open-zaak/open-zaak/commit/4b429d3243d1532f6fe731f932a201cf0d... [email protected] github.com
github.com/open-zaak/open-zaak/security/advisories/GHSA-f29q-7rpr-jmjx [email protected] github.com
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