Vulnerability Description
A new API endpoint introduced in pretix 2025 that is supposed to return all check-in events of a specific event in fact returns all check-in events belonging to the respective organizer. This allows an API consumer to access information for all other events under the same organizer, even those they should not have access to. These records contain information on the time and result of every ticket scan as well as the ID of the matched ticket. Example: { "id": 123, "successful": true, "error_reason": null, "error_explanation": null, "position": 321, "datetime": "2020-08-23T09:00:00+02:00", "list": 456, "created": "2020-08-23T09:00:00+02:00", "auto_checked_in": false, "gate": null, "device": 1, "device_id": 1, "type": "entry" } An unauthorized user usually has no way to match these IDs (position) back to individual people.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Pretix | Pretix | >= 2025.10.0, < 2026.1.2 |
Related Weaknesses (CWE)
References
- https://pretix.eu/about/en/blog/20260408-release-2026-3-1/Vendor Advisory
FAQ
What is CVE-2026-5600?
CVE-2026-5600 is a vulnerability with a CVSS score of 4.3 (MEDIUM). A new API endpoint introduced in pretix 2025 that is supposed to return all check-in events of a specific event in fact returns all check-in events belonging to the respective organizer. This allows...
How severe is CVE-2026-5600?
CVE-2026-5600 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-5600?
Check the references section above for vendor advisories and patch information. Affected products include: Pretix Pretix.