CVE-2026-71537

CVE-2026-71537 · Paymenter: Credit-refund double-spend race condition in service downgrade (doUpgrade)

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Paymenter is a free and open-source webshop solution for management of hosting services. Prior to 1.5.7, app/Livewire/Services/Upgrade.php::doUpgrade() relies on Service::upgradable to check for a pending service upgrade and later executes $credit->increment('amount', abs($price)) without DB::transaction or lockForUpdate() spanning those operations. An authenticated customer with an active downgradable service can submit concurrent downgrade requests that each observe no pending upgrade, create separate upgrade records, and increment the same account credit balance, producing multiple spendable refunds for one downgrade. This issue is fixed in version 1.5.7.

CVSS 6.5 · Средний · EPSS 0,3% · Есть исправление

Опубликовано

2026-09-18T17:43:02.740Z

Обновлено

2026-09-24T21:05:26.640Z

Стек: php

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