CVE-2026-18029: Pretix GmbH Pretix-Girosolution

Medium severity, CVSS 6.3. EPSS: 0.3% chance of exploitation in the next 30 days.

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: before 1.0.1 (fixed in 1.0.1)

Published 2026-07-28. Last modified 2026-07-30.