# CVE-2026-18029

## Summary

- **CVE ID:** CVE-2026-18029
- **Severity:** MEDIUM
- **CVSS Score:** 6.3 (CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N)
- **CWE:** CWE-841
- **Published:** Jul 28, 2026
- **Last Modified:** Jul 28, 2026

## Description

Our payment integration with GiroCheckout did not properly validate 
payment status responses. An attacker could use a successful payment 
status response from one payment and supply it to the system for a 
different payment, gaining access to multiple valid tickets with only 
one payment.

## Affected Products

- pretix GmbH — pretix-girosolution (0)

## References

- [CNA](https://pretix.eu/about/en/blog/20260728-release-2026-6-1/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.21%
- **EPSS Percentile:** 10.9

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._