CVE-2026-18029
Insufficient validation of payment status in 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.
INFO
Published Date :
July 28, 2026, 11:17 a.m.
Last Modified :
July 28, 2026, 1:17 p.m.
Remotely Exploit :
Yes !
Source :
655498c3-6ec5-4f0b-aea6-853b334d05a6
Affected Products
The following products are affected by CVE-2026-18029
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | MEDIUM | 655498c3-6ec5-4f0b-aea6-853b334d05a6 | ||||
| CVSS 4.0 | MEDIUM | 655498c3-6ec5-4f0b-aea6-853b334d05a6 |
Solution
- Implement robust validation for payment status responses.
- Verify payment status against the originating transaction.
- Ensure each response corresponds to a unique payment.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-18029.
| URL | Resource |
|---|---|
| https://pretix.eu/about/en/blog/20260728-release-2026-6-1/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-18029 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-18029
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-18029 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-18029 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 28, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-18029', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-28T12:31:51.212712Z'} -
New CVE Received by 655498c3-6ec5-4f0b-aea6-853b334d05a6
Jul. 28, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'pretix GmbH', 'product': 'pretix-girosolution', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1.0.1', 'versionType': 'python'}], 'packageName': 'pretix-girosolution', 'collectionURL': 'https://marketplace.pretix.eu', 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V4.0 AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-841 Added Reference https://pretix.eu/about/en/blog/20260728-release-2026-6-1/