CVE-2026-18029: CWE-841 Improper enforcement of behavioral workflow in pretix GmbH pretix-girosolution
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.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2026-18029 in pretix-girosolution involves improper enforcement of behavioral workflow (CWE-841) in the payment integration with GiroCheckout. Specifically, the system does not correctly validate that a payment status response corresponds to the correct payment transaction. This flaw enables an attacker to replay a successful payment status response from one payment and apply it to a different payment, effectively bypassing payment controls and gaining access to multiple tickets for the price of one.
Potential Impact
An attacker exploiting this vulnerability could gain unauthorized access to multiple valid tickets by reusing a single successful payment confirmation. This undermines the integrity of the payment process and could result in financial loss and ticketing fraud for the affected service.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented at this time.
CVE-2026-18029: CWE-841 Improper enforcement of behavioral workflow in pretix GmbH pretix-girosolution
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.
CVSS v4.0
Score 6.3medium
Affected software
pretix GmbH
pretix-girosolution
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-18029 in pretix-girosolution involves improper enforcement of behavioral workflow (CWE-841) in the payment integration with GiroCheckout. Specifically, the system does not correctly validate that a payment status response corresponds to the correct payment transaction. This flaw enables an attacker to replay a successful payment status response from one payment and apply it to a different payment, effectively bypassing payment controls and gaining access to multiple tickets for the price of one.
Potential Impact
An attacker exploiting this vulnerability could gain unauthorized access to multiple valid tickets by reusing a single successful payment confirmation. This undermines the integrity of the payment process and could result in financial loss and ticketing fraud for the affected service.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- rami.io
- Date Reserved
- 2026-07-28T07:28:43.937Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a688d829c2644c7f87ffd1c
Added to database: 07/28/2026, 11:07:46 UTC
Last enriched: 07/30/2026, 00:02:54 UTC
Last updated: 09/10/2026, 20:01:26 UTC
Views: 92
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