CVE-2026-21294: Adobe Commerce SSRF Vulnerability

CVE-2026-21294 Overview

A Server-Side Request Forgery (SSRF) vulnerability has been identified in Adobe Commerce, Adobe Commerce B2B, and Magento Open Source platforms. This vulnerability allows a high-privileged attacker to manipulate server-side requests and bypass security controls, potentially enabling access to internal resources and systems that should not be externally accessible. The vulnerability can be exploited remotely over the network without requiring user interaction.

Critical Impact

High-privileged attackers can exploit this SSRF vulnerability to bypass security features and manipulate server-side requests, potentially accessing internal infrastructure and sensitive data.

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

• March 11, 2026 - CVE-2026-21294 published to NVD
• March 11, 2026 - Last updated in NVD database

Technical Details for CVE-2026-21294

Vulnerability Analysis

This vulnerability is classified as CWE-918 (Server-Side Request Forgery). SSRF vulnerabilities occur when an application can be tricked into making server-side HTTP requests to arbitrary destinations. In the context of Adobe Commerce and Magento platforms, this flaw exists in functionality that processes URLs or makes outbound requests on behalf of users.

The vulnerability requires high privileges to exploit, indicating that an authenticated administrator or similarly privileged user would need to interact with the vulnerable functionality. However, once exploited, the attacker can bypass security controls designed to restrict server-side request destinations, potentially enabling them to probe internal network infrastructure, access cloud metadata services, or interact with internal APIs that are not meant to be externally accessible.

Root Cause

The root cause of this vulnerability lies in insufficient validation and sanitization of user-controllable input that influences server-side HTTP requests. The application fails to properly restrict the destinations for outbound requests initiated by the server, allowing attackers with elevated privileges to redirect these requests to arbitrary internal or external endpoints.

This type of vulnerability typically arises when URL parameters, import functions, webhook configurations, or similar features do not implement proper allowlisting or blocklisting of request destinations.

Attack Vector

The attack is executed over the network by an authenticated attacker with high privileges (such as an administrator). The attacker leverages the SSRF vulnerability to manipulate the destination of server-side requests, directing them to internal resources, cloud metadata endpoints, or other sensitive internal services.

Common exploitation scenarios include:

• Accessing cloud infrastructure metadata services (e.g., http://169.254.169.254/)
• Scanning internal network ports and services
• Bypassing firewall restrictions to reach internal APIs
• Exfiltrating sensitive configuration data from internal services
• Leveraging internal services for further attack escalation

The vulnerability does not require user interaction beyond the attacker's own authenticated session, making it straightforward to exploit once administrative access is obtained.

Detection Methods for CVE-2026-21294

Indicators of Compromise

• Unusual outbound HTTP requests from Adobe Commerce/Magento servers to internal IP ranges (e.g., 10.x.x.x, 172.16.x.x, 192.168.x.x)
• Requests to cloud metadata endpoints such as 169.254.169.254 from application servers
• Administrative panel activity involving URL imports, webhooks, or integration configurations with suspicious target URLs
• Log entries showing server-side requests to unexpected internal or external destinations

Detection Strategies

• Monitor web application logs for HTTP requests containing internal IP addresses or localhost references in URL parameters
• Implement network-level detection for outbound connections from commerce servers to internal-only services
• Review administrative audit logs for changes to integration endpoints, webhook URLs, or import source configurations
• Deploy web application firewall (WAF) rules to detect and block SSRF patterns in request parameters

Monitoring Recommendations

• Enable detailed logging for all administrative actions in Adobe Commerce/Magento admin panels
• Configure egress filtering and monitoring on commerce application servers
• Set up alerts for outbound connections to RFC 1918 private address ranges from application tier
• Implement DNS query logging to detect resolution of internal hostnames by commerce servers

How to Mitigate CVE-2026-21294

Immediate Actions Required

• Apply the latest security patches from Adobe as documented in security bulletin APSB26-05
• Audit current administrative user accounts and remove unnecessary high-privilege access
• Review and validate all configured webhooks, integrations, and import sources for suspicious URLs
• Implement network segmentation to limit outbound connectivity from commerce servers

Patch Information

Adobe has released security updates to address this vulnerability. Organizations should apply the appropriate patch versions based on their current installation:

• Adobe Commerce: Upgrade to the patched version as specified in Adobe Security Advisory APSB26-05
• Adobe Commerce B2B: Apply corresponding B2B module updates
• Magento Open Source: Upgrade to the patched release

Consult the official Adobe security bulletin for specific version numbers and upgrade paths applicable to your deployment.

Workarounds

• Restrict administrative access to trusted IP addresses only using firewall rules or .htaccess configurations
• Implement a web application firewall (WAF) with SSRF detection capabilities to filter malicious requests
• Apply egress filtering to block outbound connections from commerce servers to internal network ranges
• Disable or restrict unused features that allow URL imports or external integrations until patches can be applied

# Example: Restrict admin panel access by IP using .htaccess
# Add to .htaccess in the admin directory
<Directory "/var/www/html/admin">
    Require ip 10.0.0.0/8
    Require ip 192.168.1.0/24
</Directory>