Shopify Checkout Hijacking: Synctrack Apps Confirmed Safe

No Synctrack app was affected by the October 2026 Shopify checkout hijacking. Synctrack doesn’t run custom checkout JavaScript, your customers always pay on Shopify’s native checkout, and everything our apps show on your store is validated first, so no harmful JavaScript can be initialized.

How the Shopify checkout hijacking attack works

Shopify’s own checkout was never breached. The attackers went around it, through apps that stores had installed:

1. Get code into the store. Attackers got into an app’s systems and slipped JavaScript into data the app sends to storefronts, such as a settings field or a button label.
2. Catch the Checkout click. When a shopper clicked Checkout, that code sent them to a convincing fake page on a .top domain that captured their card details.
3. Hand the shopper back. The fake page then forwarded the shopper to the real checkout, so the order completed and nothing looked wrong in your admin.

The script also ran only once per browser session, which is why merchants who tested in their usual browser often saw nothing.

Which Shopify apps were affected?

The developer statements tracked by Letsmetrix and merchant reports compiled by Fudge point to these apps so far:

This list may still grow. Some affected apps may simply not have been spotted yet, which is why the playbook below is worth running even if none of these apps are on your store.

Why Synctrack apps weren’t affected by the checkout hijacking

Each move in the attack needs something Synctrack doesn’t give it:

This applies to all four Synctrack apps: PayPal Tracking Sync, Returns & Exchanges, Order Tracking and Estimated Delivery Date.

On October 20, 2026, Shopify asked every app developer to treat all rendered data as untrusted. That’s exactly the principle behind our validation step.

Is Synctrack affected by the PHP and Node.js vulnerabilities?

The checkout hijacking wasn’t the only security story this month. Here’s how Synctrack stands on the rest.

The PHP flaw. On October 21, 2026, two critical PHP vulnerabilities (CVE-2026-109618 and CVE-2026-109619, nicknamed “PHP2Shell”) were disclosed, rated 9.2 out of 10. Our systems have no exposure to them.

The Node.js fixes. The same day, Node.js released security fixes for 10 issues, the most serious being a Brotli decompression flaw that could allow remote code execution. Every Synctrack service running Node.js was updated on October 22, 2026, the next day.

Neither issue has been linked to the checkout hijacking.

The foundations. Synctrack is part of the OmegaTheme ecosystem, which runs on SOC 2 Type II security controls. According to the OmegaTheme Trust Center, that means AES-256 encryption at rest, TLS 1.3 in transit, role-based access, continuous vulnerability monitoring, penetration testing and a 99.9% monthly uptime SLA.

Your order data. Post-purchase apps handle sensitive order information, so we keep it tight: we collect only what our apps need, never sell or share merchant data, and follow GDPR and CCPA. Our Data Processing Agreement has the details.

How to check if your Shopify checkout is hijacked

You don’t need a developer for any of this. Block out 15 minutes and work through it in order.

Step 1: Test your checkout in a fresh incognito window

One rule first: don’t test in the browser you use every day. The malicious script only fired once per session, so a browser you’ve already shopped in can make an infected store look clean.

1. Open a brand-new incognito window.
2. Add any product to your cart and click Checkout.
3. Read the address bar carefully. A genuine checkout stays on your store’s domain, like your-store.com/checkouts/…. If you see an unfamiliar domain, especially one ending in .top, your store is affected.

Step 2: Disable app embeds and find the infected app

1. Go to Online Store > Themes > Customize and open App embeds in the left sidebar.
2. Toggle off every app from the list above that you have installed.
3. To find the exact culprit, turn your apps off one at a time. After each one, open a new incognito window and repeat the checkout test. When the redirect stops, you’ve found the app.
4. If customers may have entered card details on the fake page, email them straight away and recommend they contact their bank to lock their card. The faster they act, the less damage is done.
5. Report it to Shopify Support and the app’s developer, with screenshots and the fake page’s address.

Step 3: Review your apps and monitor checkout conversion

• Review your apps. Uninstall or disable anything you don’t really need or haven’t used in a while. Every installed app is one more door.
• Watch your numbers. If your conversion rate or Checkout Completed events drop suddenly while traffic holds steady, run the checkout test again immediately. It’s often the first sign that something is intercepting your customers.

Shopify checkout hijacking FAQ for Synctrack users

I use Synctrack. Do I need to change anything?

No. None of our apps were affected, so there’s nothing to change on the Synctrack side. We’d still recommend running the checkout test above, because it covers every app on your store, not just ours.

Can someone inject code through my tracking page?

Not through Synctrack. Everything we show on your tracking page, delivery date widgets and returns portal is validated before it’s generated on your store, so no harmful JavaScript can be initialized.

Does Synctrack touch my checkout?

We don’t run custom checkout JavaScript. Your customers always pay on Shopify’s native checkout.

My checkout test came back clean. Am I in the clear?

Most likely, but keep watching. Check your conversion rate and Checkout Completed events over the next few weeks, and re-test in a fresh incognito window if either dips without a drop in traffic.

Is Synctrack exposed to the PHP or Node.js vulnerabilities?

No. Our systems have no exposure to the PHP flaws CVE-2026-109618 and CVE-2026-109619, and every service running Node.js was patched on October 22, 2026.

Synctrack’s commitment to post-purchase security

The moments after a purchase are where a customer decides whether to buy from you again. A fake checkout breaks that trust before the parcel even ships. We build Synctrack to protect those moments, and that includes being careful about everything we put on your store.

We’re keeping a close eye on how this incident develops and on the new security requirements Shopify is rolling out. If anything changes, we’ll update this post.

Got a question, or something on your store that doesn’t look right? Message us from inside any Synctrack app or use our contact form.