CVE-2026-21293: Adobe Commerce SSRF Vulnerability

CVE-2026-21293 Overview

Adobe Commerce and Magento Open Source are affected by a Server-Side Request Forgery (SSRF) vulnerability that enables a high-privileged attacker to manipulate server-side requests and bypass security features. This vulnerability allows authenticated administrators to force the application server to make arbitrary HTTP requests to internal or external resources, potentially exposing sensitive data or enabling access to systems that should be isolated from the internet.

Critical Impact

High-privileged attackers can exploit this SSRF vulnerability to access unauthorized internal resources, bypass security controls, and potentially pivot to attack other systems within the network infrastructure.

Affected Products

• 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
• Adobe Commerce B2B versions 1.5.3-alpha3, 1.5.2-p3, 1.4.2-p8, 1.3.5-p13, 1.3.4-p15, 1.3.3-p16 and earlier
• Magento Open Source versions 2.4.9-alpha3, 2.4.8-p3, 2.4.7-p8, 2.4.6-p13, 2.4.5-p15 and earlier

Discovery Timeline

• 2026-03-11 - CVE-2026-21293 published to NVD
• 2026-03-11 - Last updated in NVD database

Technical Details for CVE-2026-21293

Vulnerability Analysis

This SSRF vulnerability (CWE-918) exists in Adobe Commerce and Magento Open Source e-commerce platforms. The flaw allows attackers with high privileges (administrative access) to manipulate server-side requests, effectively using the Commerce server as a proxy to reach internal systems or external resources. Since the requests originate from the trusted server rather than the attacker's system, this can bypass firewall rules, access internal services, and potentially leak sensitive information.

The vulnerability is particularly concerning in cloud environments or deployments where the Commerce server has access to internal APIs, metadata services, or other backend infrastructure that should not be directly accessible. An attacker could leverage this to enumerate internal network resources, access cloud provider metadata endpoints, or interact with internal services that trust requests from the Commerce server.

Root Cause

The root cause of this vulnerability lies in insufficient validation and sanitization of user-controlled URLs or endpoints that are subsequently used in server-side HTTP requests. When an administrative user provides a URL or resource identifier, the application fails to properly restrict the destination of outbound requests, allowing requests to arbitrary internal or external hosts.

This type of vulnerability typically occurs when:

• URL parameters are directly passed to HTTP client libraries without proper validation
• Allowlists for permitted destinations are missing or improperly implemented
• Internal IP ranges and localhost addresses are not blocked
• URL parsing can be bypassed through encoding or other manipulation techniques

Attack Vector

The attack vector is network-based and requires no user interaction, but does require the attacker to have high-privilege (administrative) access to the Adobe Commerce or Magento installation. An authenticated administrator can exploit this vulnerability by:

1. Accessing an administrative function that accepts URL input
2. Providing a crafted URL pointing to internal resources (e.g., http://169.254.169.254/ for cloud metadata)
3. The server processes the request and returns the response or performs the requested action
4. The attacker gains access to internal data or can interact with protected services

In a typical SSRF attack scenario, the attacker might target cloud metadata services to retrieve IAM credentials, internal APIs to extract sensitive data, or internal administration interfaces that are not exposed to the internet.

Detection Methods for CVE-2026-21293

Indicators of Compromise

• Unusual outbound HTTP requests from the Commerce server to internal IP ranges (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16)
• Requests to cloud metadata endpoints such as 169.254.169.254 from the application server
• Administrative users accessing URL-related functions with suspicious or internal destinations
• Outbound connections to unexpected external services or data exfiltration endpoints

Detection Strategies

• Monitor web application logs for administrative actions involving URL parameters with internal IP addresses or localhost references
• Implement network monitoring to detect outbound requests from the Commerce server to internal network segments or metadata services
• Configure web application firewall (WAF) rules to alert on SSRF patterns in request parameters
• Review audit logs for administrative access patterns that may indicate compromise or reconnaissance activity

Monitoring Recommendations

• Enable verbose logging for all administrative actions within Adobe Commerce
• Configure network-level monitoring to track outbound connections from e-commerce servers
• Implement alerting for requests to cloud provider metadata endpoints from application servers
• Regularly review access logs for unusual patterns in administrative authentication and actions

How to Mitigate CVE-2026-21293

Immediate Actions Required

• Apply the latest security patches from Adobe as detailed in security advisory APSB26-05
• Review and audit administrative user accounts to ensure only authorized personnel have high-privilege access
• Implement network segmentation to limit what internal resources the Commerce server can access
• Configure egress filtering to restrict outbound connections from the Commerce server to only necessary destinations

Patch Information

Adobe has released security patches addressing this vulnerability. Organizations should upgrade to the latest patched versions of Adobe Commerce and Magento Open Source. Detailed patch information is available in the Adobe Magento Security Advisory (APSB26-05).

For Adobe Commerce:

• Version 2.4.9: Upgrade to patched release
• Version 2.4.8: Apply patch p4 or later
• Version 2.4.7: Apply patch p9 or later
• Version 2.4.6: Apply patch p14 or later
• Version 2.4.5: Apply patch p16 or later
• Version 2.4.4: Apply patch p17 or later

Workarounds

• Implement strict network egress rules to prevent the Commerce server from making requests to internal IP ranges and metadata endpoints
• Use a web application firewall (WAF) to block SSRF attack patterns targeting known vulnerable endpoints
• Restrict administrative access to trusted IP addresses and implement multi-factor authentication for all admin accounts
• Consider deploying the Commerce application in a network segment with limited access to internal infrastructure

# Example iptables rules to block common SSRF targets from the Commerce server
# Block requests to AWS metadata service
iptables -A OUTPUT -d 169.254.169.254 -j DROP

# Block requests to internal networks (adjust as needed for your environment)
iptables -A OUTPUT -d 10.0.0.0/8 -j DROP
iptables -A OUTPUT -d 172.16.0.0/12 -j DROP
iptables -A OUTPUT -d 192.168.0.0/16 -j DROP

# Block localhost loopback attacks
iptables -A OUTPUT -d 127.0.0.0/8 -j DROP