CVE-2026-100869 json
Sylius 2.x before 2.1.16 and 2.2.9 Arbitrary Payment Action via Shop API
published 2026-09-27 42 d ago modified 2026-10-06 33 d ago also EUVD-2026-87941
- cvss
- 5.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 18%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Sylius Sylius 2.1.16, 2.2.9
- github.com/Sylius/Sylius@5813831 commit
- github.com/Sylius/Sylius#19214 pull request
- github.com/Sylius/Sylius/releases/tag/v2.2.9 release
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 41 d ago
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.2 | 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 |
| CNA | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
| CNA | 4.0 | 8.2 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- Sylius Sylius
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/Sylius/Sylius/pull/19214
patch, issue-tracking
-
github.com
/Sylius/Sylius/commit/5813831f60f3a60b735a86a57c4b519626a3b75d
patch
-
github.com
/Sylius/Sylius/security/advisories/GHSA-2rv4-pjmm-7fxf
vendor-advisory
-
github.com
/Sylius/Sylius/releases/tag/v2.2.9
release-notes
-
github.com
/Sylius/Sylius
product
-
vulncheck.com
/advisories/sylius-2-x-before-2.1.16-and-2.2.9-arbitrary-payment-action-via-shop-api
third-party-advisory
Sources
- CVE List CVE-2026-100869
- NVD CVE-2026-100869
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.