CVE-2026-100869
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.26%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 4.0
- 8.2 HIGHCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.26% probability · 18th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-863
- Source
- disclosure@vulncheck.com
EPSS moved from 0.3% on 28 September 2026 to 0.3% on 26 October 2026.
References
- https://github.com/Sylius/Sylius
- https://github.com/Sylius/Sylius/commit/5813831f60f3a60b735a86a57c4b519626a3b75d
- https://github.com/Sylius/Sylius/pull/19214
- https://github.com/Sylius/Sylius/releases/tag/v2.2.9
- https://github.com/Sylius/Sylius/security/advisories/GHSA-2rv4-pjmm-7fxf
- https://www.vulncheck.com/advisories/sylius-2-x-before-2.1.16-and-2.2.9-arbitrary-payment-action-via-shop-api
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.