CVE-2026-34647: Adobe Commerce SSRF Vulnerability

CVE-2026-34647 Overview

CVE-2026-34647 is a Server-Side Request Forgery (SSRF) vulnerability affecting Adobe Commerce. The flaw allows an attacker to bypass security controls and gain unauthorized read access to resources reachable from the server. Exploitation requires user interaction, where a victim must visit a malicious URL or interact with a compromised web page. The vulnerability has a changed scope, meaning the impact extends beyond the vulnerable component to other security boundaries. Adobe published the fix in security advisory APSB26-49.

Critical Impact

An unauthenticated attacker can bypass security measures in Adobe Commerce and gain unauthorized read access to internal resources by tricking a user into visiting a crafted URL.

Affected Products

• Adobe Commerce 2.4.9-beta1 and earlier
• Adobe Commerce 2.4.8-p4, 2.4.7-p9, 2.4.6-p14 and earlier
• Adobe Commerce 2.4.5-p16, 2.4.4-p17 and earlier

Discovery Timeline

• 2026-05-12 - CVE-2026-34647 published to NVD
• 2026-05-13 - Last updated in NVD database

Technical Details for CVE-2026-34647

Vulnerability Analysis

The vulnerability is classified as Server-Side Request Forgery under [CWE-918]. Adobe Commerce processes user-supplied input that influences outbound HTTP requests made by the server. An attacker can manipulate this input to force the server to issue requests to unintended destinations. Because the request originates from the trusted Adobe Commerce backend, it can reach resources that are not directly reachable by the attacker.

The CVSS scope is marked as changed, indicating the SSRF crosses a trust boundary. Exploitation results in confidentiality impact only — the attacker gains read access but cannot directly modify data or disrupt availability through this issue alone. The vulnerability requires the victim to interact with attacker-controlled content, such as a malicious link or compromised page that triggers the request flow.

Root Cause

The root cause is insufficient validation of URLs or host identifiers used by server-side request functionality within Adobe Commerce. The application fails to restrict outbound destinations to an allowlist or to block requests targeting internal network ranges, loopback addresses, and metadata endpoints. This permits requests against hosts the attacker should not be able to reach.

Attack Vector

The attack vector is network-based with low complexity and no privileges required. An attacker crafts a URL containing the SSRF payload and delivers it to a victim through phishing, social engineering, or a compromised page. When the victim interacts with the content, Adobe Commerce issues the attacker-controlled request server-side. The response can reveal data from internal services, metadata endpoints, or other resources protected by network segmentation.

No verified public proof-of-concept code is available. See the Adobe Security Advisory APSB26-49 for vendor technical details.

Detection Methods for CVE-2026-34647

Indicators of Compromise

• Outbound HTTP requests from Adobe Commerce hosts to internal IP ranges (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16) or loopback (127.0.0.0/8)
• Requests from the Commerce server to cloud metadata endpoints such as 169.254.169.254
• Anomalous URL parameters in Commerce request logs containing internal hostnames or file://, gopher://, or dict:// schemes

Detection Strategies

• Inspect web server and application logs for suspicious URL parameters that include IP addresses, internal hostnames, or non-HTTP schemes
• Correlate user-initiated requests with subsequent server-side outbound connections to identify SSRF patterns
• Deploy egress filtering and alert on unexpected destinations originating from Commerce application servers

Monitoring Recommendations

• Forward Adobe Commerce access and application logs to a centralized analytics platform for SSRF pattern detection
• Monitor outbound connection telemetry from Commerce hosts and baseline normal destinations
• Track failed and redirected HTTP requests originating from the server to detect probing activity

How to Mitigate CVE-2026-34647

Immediate Actions Required

• Apply the security update referenced in Adobe Security Advisory APSB26-49 to all affected Adobe Commerce installations
• Inventory all Adobe Commerce deployments and confirm versions against the affected list
• Review web server logs for indicators of SSRF probing prior to patching

Patch Information

Adobe released fixed versions through advisory APSB26-49. Administrators running 2.4.9-beta1, 2.4.8-p4, 2.4.7-p9, 2.4.6-p14, 2.4.5-p16, 2.4.4-p17, or earlier should upgrade to the patched releases identified by Adobe. Consult the Adobe Security Advisory APSB26-49 for exact target versions.

Workarounds

• Restrict outbound network access from Adobe Commerce servers using firewall rules that block traffic to internal subnets and cloud metadata services
• Place a forward proxy in front of the Commerce server with an allowlist of permitted external destinations
• Train users to avoid clicking unverified links targeting Commerce storefronts and admin panels until patching is complete

# Example iptables egress restriction blocking metadata and internal ranges
iptables -A OUTPUT -d 169.254.169.254 -j DROP
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