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🛡️ CVE-2026-5600 — pretix

🟡 CVSS 4.3 — Medium ✅ No Known Exploit CWE-653 OSV
4.3
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

pretix: API leaks check-in data between events of the same organizer

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 this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: Low — limited, and the attacker does not choose what is affected.
  • Integrity impact: None.
  • Availability impact: None.

Weakness class

CVE-2026-5600 is classified as CWE-653: Improper Isolation or Compartmentalization. The product does not properly compartmentalize or isolate functionality, processes, or resources that require different privilege levels, rights, or permissions.

Affected software

CVE-2026-5600 is recorded against 1 package.

  • pretix (from 2026.3.0 up to 2026.3.1)

Timeline and source

Published on 8 April 2026 and last revised on 24 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

pretix.eu (Advisory)
github.com (Advisory)

Other advisories for this package

pretix has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-653: Improper Isolation or Compartmentalization) in other software:

Details

Severity MEDIUM
CVSS Score 4.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE CWE-653
Public Exploit ✅ No
Source OSV
Published 2026-04-08
Updated 2026-08-20
Modified 2026-07-24
Fix URL N/A

Affected Packages

Software From version Fixed in
pretix 2026.3.0 2026.3.1

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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