CVE-2026-100869

high

Description

Sylius versions before 2.1.16 and 2.2.9 fail to restrict payment request actions in the Shop API endpoint, allowing customers to trigger refunds on completed orders. Attackers with order tokens can submit arbitrary payment actions like refunds that payment gateways execute while Sylius maintains order as paid, causing financial loss.

References

https://www.vulncheck.com/advisories/sylius-2-x-before-2.1.16-and-2.2.9-arbitrary-payment-action-via-shop-api

https://github.com/Sylius/Sylius/security/advisories/GHSA-2rv4-pjmm-7fxf

https://github.com/Sylius/Sylius/releases/tag/v2.2.9

https://github.com/Sylius/Sylius/pull/19214

https://github.com/Sylius/Sylius/commit/5813831f60f3a60b735a86a57c4b519626a3b75d

https://github.com/Sylius/Sylius

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-87941

Details

Source: Mitre, NVD

Published: 2026-09-27

Updated: 2026-09-28

Risk Information

CVSS v2

Base Score: 5.4

Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:C/A:N

Severity: Medium

CVSS v3

Base Score: 5.9

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Severity: Medium

CVSS v4

Base Score: 8.2

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00263