CVE-2026-18029

EUVD-2026-49752
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.3 MEDIUM
NETWORK
HIGH
NONE
CVSS:4.0/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
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 26.01%
Common Weakness Enumeration
References
https://pretix.eu/about/en/blog/20260728-release-2026-6-1/