CVE-2026-18029 Insufficient validation of payment status in pretix-girosolution
Attackers can reuse valid payment responses to obtain multiple tickets for a single payment, bypassing payment validation in the pretix GiroSolution integration.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18029?
CVE-2026-18029 is a medium-severity vulnerability in pretix-girosolution, published on 28 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-841
Which versions are affected by CVE-2026-18029?
How do I fix CVE-2026-18029?
No fix has been published for CVE-2026-18029 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-18029 being exploited?
There is no known exploitation of CVE-2026-18029 in the wild and no public exploit code.
Sources
Also known as GHSA-f83j-v8r3-vfhv.