# CVE-2026-101266: Pretix checkout logic flaw bypasses validation steps

Source: https://junglewise.ai/threats/cve-2026-101266-a-logic-flaw-in-the-checkout-flow-allows-users-to-bypass  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-29. Updated: 2026-09-29  
License: CC BY 4.0 with a link back

CVE-2026-101266 · Severity: info · Published 2026-09-29

Pretix is an event ticketing and registration platform. A logic flaw in the checkout flow allows users to skip required validation steps, potentially bypassing security controls or business rules designed to protect transactions. This could enable fraudulent ticket purchases or circumvention of event policies.

Technologies: [Pretix](https://junglewise.ai/threats/technologies/pretix-pretix). Vendors: [Pretix](https://junglewise.ai/threats/vendors/pretix).

## Quick answers

**Is CVE-2026-101266 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-101266 being exploited in the wild.

**How severe is CVE-2026-101266?** Informational severity, published 29 September 2026.

**Which products and versions are affected?** Pretix prior to 2026.7.1.

**Is there a fix for CVE-2026-101266?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-101266 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-101266?** Check whether you run Pretix at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A logic flaw in the checkout flow permits users to bypass validation checks by skipping entire check-in steps. The vulnerability is in the web application's checkout process and requires user interaction but no authentication bypass. An attacker can manipulate the checkout sequence to avoid validation enforcement, potentially compromising transactional integrity.

## Affected products

- Pretix Pretix prior to 2026.7.1

## Timeline

- 2026-09-29: disclosed

## References

- [https://pypi.python.org/](https://pypi.python.org/)
- [https://pretix.eu/about/en/blog/20260929-release-2026-7-1/](https://pretix.eu/about/en/blog/20260929-release-2026-7-1/)

## Related threats

- [pretix missing permission check in ticket layout API](https://junglewise.ai/threats/cve-2026-125744-our-api-endpoint-for-changing-ticket-layouts-did-not-properly)
- [Pretix payment status validation bypass in Adyen integration](https://junglewise.ai/threats/cve-2026-101275-our-payment-integration-with-adyen-did-not-properly-validate)
- [pretix improper validation of OpenID Connect response_type in SSO](https://junglewise.ai/threats/cve-2026-101274-when-pretix-is-used-as-the-identity-provider-in-a-single-sign-on)
- [pretix gift card ID enumeration and account credit increase](https://junglewise.ai/threats/cve-2026-101273-some-of-our-api-endpoints-allowed-to-create-order-payments)
- [pretix session validation bypass in API-created shredder exports](https://junglewise.ai/threats/cve-2026-101272-the-mechanism-binding-files-generated-during-a-shredding-process)