CVE-2026-31821
Medium · 5.3CVSS
5.3
EPSS
0.3%
Published
Mar 10, 2026
CISA due date
—
The record
Sylius is an Open Source eCommerce Framework on Symfony. The POST /api/v2/shop/orders/{tokenValue}/items endpoint does not verify cart ownership. An unauthenticated attacker can add items to other registered customers' carts by knowing the cart tokenValue. An attacker who obtains a cart tokenValue can add arbitrary items to another customer's cart. The endpoint returns the full cart representation in the response (HTTP 201). The issue is fixed in versions: 2.0.16, 2.1.12, 2.2.3 and above.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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