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Adobe Commerce APSB26-146: Critical Security Fixes Require Urgent Action

08 Sep 2026
Albert Wood
Albert Wood
Adobe Commerce APSB26-146: Critical Security Fixes Require Urgent Action

On September 7, 2026, Adobe released APSB26-146, addressing CVE-2026-75650, a critical vulnerability affecting Adobe Commerce and Magento Open Source.

Adobe Commerce and Magento Open Source merchants should act quickly following the release of security bulletin APSB26-146. The update addresses a critical zero-day vulnerability that could allow unauthenticated attackers to execute arbitrary code on vulnerable stores.

Adobe has confirmed that the vulnerability is being actively exploited in the wild. With a CVSS score of 10.0 and no authentication required for exploitation, affected stores face a significant security risk.

Key Vulnerabilities Addressed by the Adobe Commerce Security Update

This patch addresses “Improper Neutralization of Special Elements Used in a Template Engine,” a critical security vulnerability. 

CVE-2026-75650 is classified as an “Improper Neutralization of Special Elements Used in a Template Engine” vulnerability. 

In simple terms, the issue involves how Adobe Commerce processes certain elements within its template engine. If improperly handled, specially crafted input could be interpreted in a way that allows an attacker to execute unintended code.

The risk is particularly serious because an attacker does not need valid store credentials to exploit the vulnerability.

Successful exploitation could give an attacker the ability to execute unauthorized code on an affected Adobe Commerce or Magento Open Source installation.

Why Merchants Should Take Adobe Commerce APSB26-146 Security Update Seriously

  • Critical Severity: CVSS score of 10.0
  • No Authentication Required: Attackers don’t need valid credentials to attempt exploitation.
  • Active Exploitation: Adobe has confirmed exploitation in the wild.
  • Potential Code Execution: Successful exploitation could allow unauthorized code to run.
  • Potential Downstream Impact: A compromised store may expose applications, credentials, customer information, or connected systems.

Versions Affected by the Adobe Commerce Security Update APSB26-146

The Adobe Commerce Security Update APSB26-146 impacts the following versions of Adobe Commerce, Adobe Commerce B2B, and Magento Open Source:

  • Adobe Commerce: 2.4.9-2026-aug and earlier, 2.4.8-2026-aug and earlier, 2.4.7-2026-aug and earlier, 2.4.6-2026-aug and earlier, 2.4.5-2026-aug and earlier, 2.4.4-2026-aug and earlier
  • Adobe Commerce B2B: 1.5.3-2026-aug and earlier, 1.5.2-2026-aug and earlier, 1.4.2-2026-aug and earlier, 1.3.4-2026-aug and earlier, 1.3.3-2026-aug and earlier
  • Magento Open Source: 2.4.9-2026-aug and earlier, 2.4.8-2026-aug and earlier, 2.4.7-2026-aug and earlier, 2.4.6-2026-aug and earlier

Important: The advisory covers Adobe Commerce on Cloud, Adobe Commerce on-premises, Magento Open Source, and Adobe Commerce B2B deployments.

How to Address APSB26-146 Security Update

Applying the hotfix is the immediate priority, but merchants should take a broader security approach because the vulnerability is already being exploited.

Step 1: Identify Your Commerce Version

First, determine which Adobe Commerce or Magento Open Source version your store is running.

Compare your installed version with Adobe’s affected-version list to determine whether your environment requires remediation.

Step 2: Apply the VULN-3941 Hotfix

Install the VULN-39341 Hotfix corresponding to your Adobe Commerce or Magento Open Source version.

Adobe has officially tested the hotfix against the versions specified in its remediation guidance. Compatibility with other versions has not been officially verified.

Step 3: Rotate Your Encryption Keys

After applying the hotfix, rotate the encryption keys associated with your Commerce installation.

This is important because the vulnerability is actively exploited and previously accessible credentials or sensitive values may have been exposed.

However, rotating encryption keys alone does not invalidate credentials that an attacker may have already obtained.

Step 4: Rotate Potentially Exposed Credentials

Review and regenerate credentials that may have been exposed, including:

  • Admin passwords
  • API and integration credentials
  • Payment gateway credentials
  • Database credentials
  • SSH and deployment keys
  • Third-party integration credentials
  • Service account credentials

Where possible, regenerate credentials through the system or service that issued them rather than simply updating their stored value in Adobe Commerce.

Step 5: Verify the Remediation

After applying the hotfix and rotating credentials:

  • Confirm that the correct hotfix is installed.
  • Verify that the expected security changes are present.
  • Test critical storefront functionality.
  • Review application and server logs.
  • Monitor the environment for unusual activity.

How to Check Your Store for Signs of a Compromise

Patching a vulnerable store is essential, but it shouldn’t be the end of your security investigation. Because CVE-2026-75650 is actively exploited, merchants should determine whether suspicious activity occurred before the hotfix was applied.

A server-level investigation should include the following checks.

Check Cron Jobs for Suspicious Activity

Review server cron jobs for unfamiliar entries, recently created tasks, or commands that don’t belong to your normal Commerce operations.

Attackers may use cron jobs to establish persistence or execute malicious processes repeatedly.

Look For:

  • Unknown or recently created cron jobs
  • Commands pointing to unfamiliar scripts
  • Unexpected changes to Commerce-related cron jobs
  • Processes running under unauthorized users
  • Scheduled commands that don’t match your deployment processes

Scan Server Files for Malicious Changes

Perform a server-level file scan to identify modified, newly created, or suspicious files.

Where possible, compare core Adobe Commerce files against known-good versions.

Pay Particular Attention to:

  • Unexpected files in the Commerce root
  • Suspicious files in writable directories
  • Modified core files
  • Obfuscated or encoded PHP code
  • Recently changed executable files
  • Files that cannot be associated with a legitimate deployment

This is particularly important because an attacker may modify files or establish persistence even after the initial vulnerability has been patched.

Check for Customer or Payment Data Exposure

Review application, server, and security logs for evidence that attackers may have accessed customer or payment-related information.

Look for:

  • Unusual requests
  • Unexpected administrative activity
  • Unauthorized access attempts
  • Suspicious data transfers
  • Unexpected checkout-related scripts
  • Code that could capture information entered during checkout

If you find evidence that payment information may have been compromised, treat the situation as a potential security incident and involve your security team and relevant payment providers immediately.

Remove Unknown Users and Accounts

Review both Adobe Commerce administrator accounts and server-level users.

Look For:

  • Unknown administrator accounts
  • Recently created users
  • Unexpected privilege changes
  • Unfamiliar API integrations
  • Unknown access tokens
  • Unauthorized service accounts

Remove accounts that cannot be verified as legitimate and investigate when and how they were created.

Run a Magento Security Scan

Run a Magento/Adobe Commerce security scan to identify known malware, suspicious code, vulnerabilities, and other indicators of compromise.

However, don’t rely on a storefront scan alone.

A compromised server may contain malicious files, unauthorized users, cron-based persistence, or compromised credentials that aren’t visible through a basic storefront scan.

What if You Find Suspicious Activity on Your Adobe Commerce/Magento Store?

If your investigation uncovers suspicious files, unknown users, unusual cron jobs, unauthorized access, or potential customer-data exposure, don’t assume that applying the APSB26-146 hotfix has completely resolved the incident.

Instead:

  • Isolate: Restrict or isolate the affected environment where appropriate.
  • Preserve: Preserve relevant logs, files, timestamps, and other evidence before making extensive changes.
  • Investigate: Have the server and Commerce installation reviewed by a qualified security professional.
  • Rotate: Regenerate potentially exposed credentials and access keys.
  • Remediate: Remove malicious files, unauthorized accounts, persistence mechanisms, and other identified threats.
  • Monitor: Continue monitoring the environment for unusual activity after remediation.

How to Install the Adobe Commerce APSB26-146 Security Update

Use a controlled deployment process to reduce the risk of disrupting your storefront.

Step 1: Download the Appropriate Patch

Obtain the hotfix corresponding to your Adobe Commerce or Magento Open Source version.

Step 2: Test on Staging

Apply the hotfix to a staging environment first.

Step 3: Verify the Installation

Confirm that the hotfix has been installed correctly and that the expected security changes are present.

Step 4: Test Store Functionality

Check critical functionality, including:

  • Customer login
  • Product browsing
  • Cart and checkout
  • Payments
  • Admin functionality
  • APIs and integrations

Step 5: Deploy to Production

Once the patch has been validated, deploy it to your live environment using your normal change-management process.

Do You Need Help Securing Your Adobe Commerce Store?

For an actively exploited critical vulnerability, speed matters—but so does doing the remediation correctly.

ioVista, an Adobe Commerce certified partner, can help your team assess the affected environment, apply the required security update, verify the remediation, and minimize disruption to ongoing eCommerce operations.

Don’t wait for suspicious activity to appear. Secure your Adobe Commerce store now.

Connect with ioVista’s Adobe Commerce experts

Click here for the official link.

Albert Wood
Albert Wood linkedin

Albert Wood is an accomplished eCommerce Business Analyst. As a technology futurist and sales motivator at ioVista, Albert is dedicated to transforming struggling eCommerce businesses into thriving enterprises. With a keen focus on client’s business processes, user experience (UX), and leveraging the power of digital marketing, he helps businesses optimize their online presence and drive sustainable growth. Albert’s passion is for virtual reality (VR), augmented reality (AR), and mixed reality (MR), immersing himself in unforgettable experiences and exploring the limitless possibilities they offer. His enthusiasm for these emerging technologies fuels his drive to push the boundaries of innovation in eCommerce.

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