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CVE-2026-18029— Insufficient validation of payment status in pretix-girosolution

Quick assessment

Affected
pretix GmbH pretix-girosolution
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

pretix GmbH pretix-girosolution是pretix GmbH公司的一款企业应用扩展组件。 pretix GmbH pretix-girosolution 1.0.1之前版本存在处理逻辑错误漏洞，该漏洞源于对支付状态响应验证不当，可能导致攻击者通过使用一次支付的成功状态响应为另一笔支付提供，从而用一次支付获得多个有效票证。

CVSS 6.3 · Medium EPSS 0.33% · P24

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
pretix GmbH pretix-girosolution < 1.0.1 affected
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I. Basic Information for CVE-2026-18029

Vulnerability Information
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Vulnerability Title
Insufficient validation of payment status in pretix-girosolution
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
行为工作流的不恰当实施
Source: CVE Program / CVE List V5
Vulnerability Title
pretix GmbH pretix-girosolution 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
pretix GmbH pretix-girosolution是pretix GmbH公司的一款企业应用扩展组件。 pretix GmbH pretix-girosolution 1.0.1之前版本存在处理逻辑错误漏洞，该漏洞源于对支付状态响应验证不当，可能导致攻击者通过使用一次支付的成功状态响应为另一笔支付提供，从而用一次支付获得多个有效票证。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
pretix GmbH pretix-girosolution 0 ~ 1.0.1 -

II. Public POCs for CVE-2026-18029

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III. Intelligence Information for CVE-2026-18029

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Security Blog Posts for CVE-2026-18029 (1)

IV. Related Vulnerabilities

Same vendor: pretix GmbH
Same weakness: CWE-841

V. Comments for CVE-2026-18029

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