CVE-2026-31821 Sylius is Missing Authorization in API v2 Add Item Endpoint

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...