Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-5600

Severity CVSS v4.0:
MEDIUM
Type:
Unavailable / Other
Publication date:
08/04/2026
Last modified:
24/04/2026

Description

A new API endpoint introduced in pretix 2025 that is supposed to <br /> return all check-in events of a specific event in fact returns all <br /> check-in events belonging to the respective organizer. This allows an <br /> API consumer to access information for all other events under the same <br /> organizer, even those they should not have access to.<br /> <br /> <br /> These records contain information on the time and result of every ticket scan as well as the ID of the matched ticket. Example:<br /> <br /> <br /> {<br /> "id": 123,<br /> "successful": true,<br /> "error_reason": null,<br /> "error_explanation": null,<br /> "position": 321,<br /> "datetime": "2020-08-23T09:00:00+02:00",<br /> "list": 456,<br /> "created": "2020-08-23T09:00:00+02:00",<br /> "auto_checked_in": false,<br /> "gate": null,<br /> "device": 1,<br /> "device_id": 1,<br /> "type": "entry"<br /> }<br /> <br /> <br /> <br /> An unauthorized user usually has no way to match these IDs (position) back to individual people.

Impact

Vector 4.0
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 CVSS v4.0 Severity and Metrics:

Base Score: 5.50 MEDIUM
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

Attack Vector (AV): Network
Attack Complexity (AC): Low
Attack Requirements (AT): Present
Privileges Required (PR): High
User Interaction (UI): None
Confidentiality (VC): Low
Integrity (VI): None
Availability (VA): None
Confidentiality (SC): High
Integrity (SI): High
Availability (SA): High

Base Score 4.0
5.50
Severity 4.0
MEDIUM
Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 4.30 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): None
Availability (A): None

Base Score 3.x
4.30
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:pretix:pretix:*:*:*:*:*:*:*:* 2025.10.0 (including) 2026.1.2 (excluding)
cpe:2.3:a:pretix:pretix:*:*:*:*:*:*:*:* 2026.2.0 (including) 2026.2.1 (excluding)
cpe:2.3:a:pretix:pretix:*:*:*:*:*:*:*:* 2026.3.0 (including) 2026.3.1 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools