Vulnerability · Published Apr 8, 2026 · Assigned by rami.io
CVE-2026-5600
Medium 5.5
In plain English
A medium-severity security flaw in pretix from pretix. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | pretix | 2026.3.1 | GHSA-wr8q-c73g-m7gp |
| PyPI | pretix | 2026.2.1 | GHSA-wr8q-c73g-m7gp |
| PyPI | pretix | 2026.1.2 | GHSA-wr8q-c73g-m7gp |
| PyPI | pretix | 2026.1.2, 2026.2.1, 2026.3.1 | PYSEC-2026-111 |
Affected products (as reported)
Weakness: CWE-653 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:H