---
id: CVE-2026-100872
title: >-
  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
summary: >-
  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…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'
cwe:
  - CWE-345
vendor: Sylius
product: sylius/sylius
affected:
  - sylius/sylius >= 2.0.0 < 2.1.16
  - sylius/sylius >= 2.2.0 < 2.2.9
published: '2026-09-27'
updated: '2026-09-27'
sourceUpdated: '2026-09-27T13:16:38.523'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100872'
references:
  - url: 'https://github.com/Sylius/Sylius'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/Sylius/Sylius/commit/9e9aeaacbc97b1fc01d573e44d6679194527905d
    label: disclosure@vulncheck.com
  - url: 'https://github.com/Sylius/Sylius/pull/19216'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/Sylius/Sylius/releases/tag/v2.2.9'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/Sylius/Sylius/security/advisories/GHSA-vv4h-q2x8-74g4'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/sylius-2-x-before-2.1.16-and-2.2.9-payment-amount-overwrite
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-27T13:53:26.576Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.