CVE-2026-53637

Workarounds

If users cannot update Sylius immediately, they should create a patched copy of the affected class in their application's src/ directory and override the Sylius service definition to use it.

Step 1. Create src/Twig/Component/Cart/FormComponent.php

<?php

declare(strict_types=1);

namespace App\Twig\Component\Cart;

use Doctrine\Persistence\ObjectManager;
use Sylius\Bundle\UiBundle\Twig\Component\ResourceFormComponentTrait;
use Sylius\Bundle\UiBundle\Twig\Component\TemplatePropTrait;
use Sylius\Component\Core\Model\OrderInterface;
use Sylius\Component\Core\OrderCheckoutStates;
use Sylius\Component\Core\Repository\OrderRepositoryInterface;
use Sylius\Component\Order\SyliusCartEvents;
use Sylius\Resource\Model\ResourceInterface;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Symfony\Component\EventDispatcher\GenericEvent;
use Symfony\Component\Form\FormFactoryInterface;
use Symfony\UX\LiveComponent\Attribute\LiveAction;
use Symfony\UX\LiveComponent\Attribute\LiveArg;
use Symfony\UX\LiveComponent\Attribute\PreReRender;
use Symfony\UX\LiveComponent\ComponentToolsTrait;

class FormComponent
{
    use ComponentToolsTrait;

    /** @use ResourceFormComponentTrait<OrderInterface> */
    use ResourceFormComponentTrait;

    use TemplatePropTrait;

    public const SYLIUS_SHOP_CART_CHANGED = 'sylius:shop:cart_changed';

    public const SYLIUS_SHOP_CART_CLEARED = 'sylius:shop:cart_cleared';

    public bool $shouldSaveCart = true;

    /** @param OrderRepositoryInterface<OrderInterface> $orderRepository */
    public function __construct(
        OrderRepositoryInterface $orderRepository,
        FormFactoryInterface $formFactory,
        string $resourceClass,
        string $formClass,
        protected readonly ObjectManager $manager,
        protected readonly EventDispatcherInterface $eventDispatcher,
    ) {
        $this->initialize($orderRepository, $formFactory, $resourceClass, $formClass);
    }

    public function hydrateResource(mixed $value): ?ResourceInterface
    {
        if (empty($value)) {
            return $this->createResource();
        }

        /** @var OrderInterface|null $order */
        $order = $this->repository->find($value);

        if (
            !$order instanceof OrderInterface
            || $order->getCheckoutState() === OrderCheckoutStates::STATE_COMPLETED
        ) {
            return $this->createResource();
        }

        return $order;
    }

    #[PreReRender(priority: -100)]
    public function saveCart(): void
    {
        if ($this->shouldSaveCart && $this->resource?->getId() !== null) {
            $form = $this->getForm();
            if ($form->isValid()) {
                $this->eventDispatcher->dispatch(new GenericEvent($form->getData()), SyliusCartEvents::CART_CHANGE);
                $this->manager->flush();
                $this->emit(self::SYLIUS_SHOP_CART_CHANGED, ['cartId' => $this->resource->getId()]);
            }
        }
    }

    #[LiveAction]
    public function removeItem(#[LiveArg] int $index): void
    {
        if ($this->resource?->getId() === null) {
            return;
        }

        $data = $this->formValues['items'];
        unset($data[$index]);
        $this->formValues['items'] = array_values($data);

        $orderItem = $this->resource->getItems()->get($index);
        $this->eventDispatcher->dispatch(new GenericEvent($orderItem), SyliusCartEvents::CART_ITEM_REMOVE);

        $this->manager->persist($this->resource);
        $this->manager->flush();
        $this->manager->refresh($this->resource);

        $this->shouldSaveCart = false;
        $this->submitForm();
        $this->emit(self::SYLIUS_SHOP_CART_CHANGED, ['cartId' => $this->resource->getId()]);
    }

    #[LiveAction]
    public function clearCart(): void
    {
        if ($this->resource?->getId() === null) {
            return;
        }

        $this->formValues['items'] = [];
        $this->eventDispatcher->dispatch(new GenericEvent($this->resource), SyliusCartEvents::CART_CLEAR);
        $this->manager->remove($this->resource);
        $this->manager->flush();

        $this->resource = $this->createResource();
        $this->resetForm();
        $this->isValidated = false;
        $this->validatedFields = [];

        $this->shouldSaveCart = false;
        $this->submitForm();
        $this->emit(self::SYLIUS_SHOP_CART_CLEARED);
    }

    #[LiveAction]
    public function removeCoupon(): void
    {
        $this->formValues['promotionCoupon'] = '';

        $this->submitForm();
    }

    private function getDataModelValue(): string
    {
        return 'debounce(500)|*';
    }
}

Step 2. Override the Sylius service in config/services.yaml

Append to the application's config/services.yaml (or a dedicated file loaded by the kernel, e.g. config/packages/sylius_security_cart.yaml):

services:
    sylius_shop.twig.component.cart.form:
        class: App\Twig\Component\Cart\FormComponent
        arguments:
            - '@sylius.repository.order'
            - '@form.factory'
            - '%sylius.model.order.class%'
            - 'Sylius\Bundle\ShopBundle\Form\Type\CartType'
            - '@doctrine.orm.entity_manager'
            - '@event_dispatcher'
        calls:
            - [setLiveResponder, ['@ux.live_component.live_responder']]
        tags:
            - { name: sylius.live_component.shop, key: 'sylius_shop:cart:form' }

This redeclares the existing Sylius service id sylius_shop.twig.component.cart.form so it instantiates the patched class from App\ while preserving every argument, call and tag from the original Sylius XML definition. The cart twig hook keeps resolving to the same Live Component key (sylius_shop:cart:form).

Step 3. Clear the cache

bin/console cache:clear

Reporters

We would like to extend our gratitude to the following individuals for their detailed reporting and responsible disclosure of this vulnerability:

• Kévin Gonella (@kgonella)
• Sam V.

For more information

If there are any questions or comments about this advisory:

• Open an issue in Sylius issues
• Send an email to [email protected]