Open Zaak: Path traversal / arbitrary server-file read via Documenten API document import (bestandspad)

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2026-55836 · Microsoft / collected KEV context

cve-program · CVE-2026-55836

• https://github.com/open-zaak/open-zaak/security/advisories/GHSA-x5cj-23hr-5r54
• https://github.com/open-zaak/open-zaak/commit/4b23957b55ab792bc2ba1fbc5ce6918881b62ab8
• https://github.com/open-zaak/open-zaak/commit/69c78ce2a0edb45bec8809bc2205585c5f8a4054
• https://github.com/open-zaak/open-zaak/commit/8acd5e59e0132aa19284bf22f7b3defca279e2ce
• https://github.com/open-zaak/open-zaak/releases/tag/1.27.2
• https://github.com/open-zaak/open-zaak/releases/tag/1.28.2
• https://github.com/open-zaak/open-zaak/releases/tag/1.29.0

No related operational record is retained in the current change model.