CVE-2026-5600
CVE-2026-5600 is a medium-severity vulnerability in Pretix with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-653.
Key facts
- Severity: Medium (CVSS 3.x base score 4.3)
- CVSS v4: 5.5
- EPSS exploit prediction: 0% (17th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-20463
- Weakness: CWE-653
- Affected product: Pretix
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-5600?
- 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.
- How severe is CVE-2026-5600?
- CVE-2026-5600 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
- Is CVE-2026-5600 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-5600?
- CVE-2026-5600 affects Pretix. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-5600?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-5600 have an EU (EUVD) identifier?
- Yes. CVE-2026-5600 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20463.
- When was CVE-2026-5600 published?
- CVE-2026-5600 was published on 2026-04-08 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:pretix:pretix:*:*:*:*:*:*:*:*
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