CVE-2026-21360
📋 TL;DR
This path traversal vulnerability in Adobe Commerce allows high-privileged attackers to bypass security restrictions and access files or directories outside intended paths. It affects Adobe Commerce versions 2.4.9-alpha3, 2.4.8-p3, 2.4.7-p8, 2.4.6-p13, 2.4.5-p15, 2.4.4-p16 and earlier. No user interaction is required for exploitation.
💻 Affected Systems
- Adobe Commerce
- Magento Open Source
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
High-privileged attacker gains unauthorized access to sensitive system files, configuration files, or user data, potentially leading to complete system compromise.
Likely Case
Privileged user or compromised admin account accesses restricted files containing configuration data, API keys, or sensitive business information.
If Mitigated
Attack is blocked by proper file permission controls, web server restrictions, or security modules that prevent directory traversal.
🎯 Exploit Status
Exploitation requires high-privileged access but is technically simple once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to Adobe Commerce 2.4.9-alpha4, 2.4.8-p4, 2.4.7-p9, 2.4.6-p14, 2.4.5-p16, 2.4.4-p17 or later
Vendor Advisory: https://helpx.adobe.com/security/products/magento/apsb26-05.html
Restart Required: Yes
Instructions:
1. Backup your Adobe Commerce instance and database. 2. Apply the security patch via Composer: composer require magento/product-community-edition=2.4.9-alpha4 (or appropriate version). 3. Run setup upgrade: bin/magento setup:upgrade. 4. Clear cache: bin/magento cache:clean. 5. Restart web server services.
🔧 Temporary Workarounds
Restrict Admin Access
allLimit administrative access to trusted IP addresses only
# In web server config (Apache example):
<Location /admin>
Require ip 192.168.1.0/24
</Location>
# In web server config (Nginx example):
location /admin {
allow 192.168.1.0/24;
deny all;
}
Implement Web Application Firewall
allConfigure WAF rules to block path traversal patterns
# ModSecurity rule example:
SecRule ARGS "\.\./" "id:1001,phase:2,deny,msg:'Path Traversal Attack Detected'
🧯 If You Can't Patch
- Implement strict principle of least privilege for all admin accounts
- Deploy file integrity monitoring to detect unauthorized file access attempts
🔍 How to Verify
Check if Vulnerable:
Check Adobe Commerce version via admin panel or run: php bin/magento --versionCheck Version:
php bin/magento --versionVerify Fix Applied:
Verify version is updated to patched version and test admin functionality remains intact📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns in web server logs
- Multiple failed attempts to access restricted paths from admin accounts
- Requests containing '../' or similar traversal patterns
Network Indicators:
- Unusual file download patterns from admin interfaces
- Multiple requests to sensitive file paths
SIEM Query:
source="web_server_logs" AND (uri="*../*" OR uri="*/etc/passwd*" OR uri="*/config*" OR uri="*/env.php*") AND user_agent="*admin*"