What’s Vulnerable › Vulnerabilities
CVE-2026-5600
- Severity: medium (CVSS 4.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-04-08 · updated 2026-07-24
- Weakness: CWE-653
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.
Affected products
- pretix: from 2025.10.0 before 2026.1.2; from 2026.2.0 before 2026.2.1; from 2026.3.0 before 2026.3.1 — fixed in 2026.1.2, 2026.2.1, 2026.3.1
How to fix
Upgrade to a fixed version: pretix 2026.1.2, 2026.2.1, 2026.3.1. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-5600 or the next vulnerability affects your stack