CVE-2026-55836Open Zaak: Path traversal / arbitrary server-file read via Documenten API document import (bestandspad)
Updated under an hour ago ()
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Open Zaak is an open-source data and services layer for Dutch case-oriented working. From 1.13.0 until 1.27.2, 1.28.2, and 1.29.0, _import_document_row in src/openzaak/components/documenten/tasks.py uses the attacker-controlled bestandspad CSV field without ensuring that the resolved path remains under IMPORT_DOCUMENTEN_BASE_DIR. A client with an all-authorizations application token can supply an absolute or parent-traversal path to a file readable by the Celery service account. The worker copies that file into document storage, allowing its contents to be retrieved through the normal document download API and exposing server secrets or other private files. This issue is fixed in versions 1.27.2, 1.28.2, and 1.29.0.
- CVSS
- 6.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
- Weakness (CWE)
- CWE-200
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 16, 2026
Affected products
open-zaak open-zaak open_zaak:open_zaak (from the name) | from 1.13.0, < 1.27.2; from 1.28.0, < 1.28.2 | CNA record |
References
- https://github.com/open-zaak/open-zaak/security/advisories/GHSA-x5cj-23hr-5r54x-refsource-confirm
- https://github.com/open-zaak/open-zaak/commit/4b23957b55ab792bc2ba1fbc5ce6918881b62ab8x-refsource-misc
- https://github.com/open-zaak/open-zaak/commit/69c78ce2a0edb45bec8809bc2205585c5f8a4054x-refsource-misc
- https://github.com/open-zaak/open-zaak/commit/8acd5e59e0132aa19284bf22f7b3defca279e2cex-refsource-misc
- https://github.com/open-zaak/open-zaak/releases/tag/1.27.2x-refsource-misc
- https://github.com/open-zaak/open-zaak/releases/tag/1.28.2x-refsource-misc
- https://github.com/open-zaak/open-zaak/releases/tag/1.29.0x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.