The payment integration pretix-oppwa provides support for the payment providers VR Payment,...
Summary
Vulnerability reported (CVE-2026-13603). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
The payment integration pretix-oppwa provides support
for the payment providers VR Payment, Hobex, and potentially others
based on Oppwa's technology. The integration of Oppwa, following their
official documentation, includes a step where the user is redirected
from the payment provider back to our system with a query parameter like
?resourcePath=/v1/checkouts/{checkoutId}/payment in the URL. Our system is then supposed to fetch the status of the transaction from the URL given by baseUrl + resourcePath.
Our plugin pretix-oppwa did so insecurely by
concatenating the parameter form the URL to the base domain of the API
without further validation and, critically, without a / at the end of the baseUrl. Therefore, an attacker could inject a resourcePath argument in a way that causes pretix to call a different
server instead. Since the request includes the access token (API key)
of the Oppwa account, this would leak the access token, giving access to
data contained in the payment provider's system. This is fixed with the
release today by strictly validating the given API URL.
After installing the update, we recommend asking your payment provider for a new access token and updating it in pretix.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-13603 has been found.
Risk of unauthorized operations or information disclosure.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "CVE-2026-13603" on the vendor's site.
CVE-2026-13603 — CWE-20
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-20) has been reported.
Check the vendor advisory for the affected versions.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで影響コンポーネントを特定する。
-
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- advisory nvd.nist.gov
- advisory pretix.eu
- advisory github.com
- package github.com
- web pretix.eu
- web github.com
- web pypi.python.org