Sylius up to 2.1.15/2.2.8 Payment Amount Validation input validation

Summaryinfo

A vulnerability classified as problematic has been found in Sylius up to 2.1.15/2.2.8. Impacted is an unknown function of the component Payment Amount Validation. This manipulation causes input validation. The identification of this vulnerability is CVE-2026-100872. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Sylius up to 2.1.15/2.2.8 and classified as problematic. Affected by this vulnerability is some unknown processing of the component Payment Amount Validation. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect integrity. The summary by CVE is:

Sylius versions before 2.1.16 and 2.2.9 fail to validate payment amounts during cart recalculation, allowing unauthenticated attackers to modify order totals after gateway transaction initiation. Attackers can pay a small amount, enlarge the order after gateway capture, and have the system mark the inflated order as fully paid while the gateway captured only the original amount.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-100872 since 09/27/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 2.1.16 or 2.2.9 eliminates this vulnerability.

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Productinfo

Name

• Sylius

Version

• 2.1.0
• 2.1.1
• 2.1.2
• 2.1.3
• 2.1.4
• 2.1.5
• 2.1.6
• 2.1.7
• 2.1.8
• 2.1.9
• 2.1.10
• 2.1.11
• 2.1.12
• 2.1.13
• 2.1.14
• 2.1.15
• 2.2.0
• 2.2.1
• 2.2.2
• 2.2.3
• 2.2.4
• 2.2.5
• 2.2.6
• 2.2.7
• 2.2.8

Website

• Product: https://github.com/Sylius/Sylius/

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