CVE-2026-47198 Paymenter: URL parameter injection bypasses paid plan limits at checkout
Authenticated users can inject URL parameters to override administrator-defined hosting resource limits and plan tiers during checkout.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-47198?
CVE-2026-47198 is a high-severity vulnerability in Paymenter, published on 20 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Paymenter is a free and open-source webshop solution for management of hosting services. In versions prior to 1.5.1, the checkout component improperly filters URL-writable properties, allowing authenticated users to inject arbitrary key-value pairs into server provisioning parameters. Because bundled server extensions prioritize these user-supplied properties over administrator-defined configurations, a regular user can override hosting plans and resource limits at checkout without special privileges. The Checkout Livewire component's $checkoutConfig property exposed via URL query parameters, only validating keys explicitly defined by an extension's configuration method, allowing any undefined injected keys to bypass validation entirely. These unsanitized keys are then stored directly in the database by the cart component and later passed to server extensions during provisioning, enabling user-injected data to override intended administrator settings. Depending on the active extension, this leads to unauthorized overrides of core resource limits (such as CPU, RAM, storage, or package tiers). No administrative privileges are required to exploit this vulnerability. This issue has been fixed in version 1.5.1.
Which versions are affected by CVE-2026-47198?
2 open source packages ship an affected version, including paymenter/paymenter.
| Package | Affected | Fixed in |
|---|---|---|
paymenter/paymenter Packagist | All versions | 1.5.1 |
paymenter/paymenter Packagist | All versions | 1.5.1 |
How do I fix CVE-2026-47198?
Upgrade paymenter/paymenter to 1.5.1 or later.
Is CVE-2026-47198 being exploited?
There is no known exploitation of CVE-2026-47198 in the wild and no public exploit code.
Sources
Also known as GHSA-5q4q-834j-g8g4.