CVE-2026-54657
Open Zaak: /zaken/_zoek and /enkelvoudiginformatieobjecten/_zoek endpoints do not filter result lists based on authorizations linked to token
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.
INFO
Published Date :
Oct. 16, 2026, 4:18 p.m.
Last Modified :
Oct. 16, 2026, 4:18 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Open Zaak to version 1.27.2 or later.
- Apply the patch for versions 1.27.2, 1.28.2, or 1.29.0.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-54657.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-54657 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-54657
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-54657 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-54657 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Oct. 16, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-285 Added CWE CWE-639 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/54xxx/CVE-2026-54657.json">CVE-2026-54657</a> Added Reference https://github.com/open-zaak/open-zaak/commit/15456f1a0ef4b0abf1b1c0e3a16c99c15423b9fd Added Reference https://github.com/open-zaak/open-zaak/commit/4b429d3243d1532f6fe731f932a201cf0ddc4c18 Added Reference https://github.com/open-zaak/open-zaak/commit/d3869af98c60570782f867bab3e1d14fd8d8330f Added Reference https://github.com/open-zaak/open-zaak/releases/tag/1.27.2 Added Reference https://github.com/open-zaak/open-zaak/releases/tag/1.28.2 Added Reference https://github.com/open-zaak/open-zaak/releases/tag/1.29.0 Added Reference https://github.com/open-zaak/open-zaak/security/advisories/GHSA-f29q-7rpr-jmjx