CVE-2026-31910: Apache OFBiz SSRF Vulnerability

CVE-2026-31910 Overview

CVE-2026-31910 is a Server-Side Request Forgery (SSRF) vulnerability in Apache OFBiz, an open-source enterprise resource planning (ERP) framework used to build business applications. The flaw affects all versions of Apache OFBiz prior to 24.09.06. Remote, unauthenticated attackers can coerce the server into issuing arbitrary outbound HTTP requests on their behalf. The vulnerability is classified under CWE-918: Server-Side Request Forgery and impacts confidentiality of internal resources reachable from the OFBiz host. The Apache Software Foundation recommends upgrading to version 24.09.06 to remediate the issue.

Critical Impact

Unauthenticated attackers can abuse the SSRF flaw to access internal services, cloud metadata endpoints, or other restricted network resources reachable from the OFBiz server.

Affected Products

• Apache OFBiz versions before 24.09.06
• Deployments exposing OFBiz web endpoints to untrusted networks
• Enterprise applications built on top of vulnerable OFBiz releases

Discovery Timeline

• 2026-05-19 - CVE-2026-31910 published to NVD
• 2026-05-19 - Last updated in NVD database

Technical Details for CVE-2026-31910

Vulnerability Analysis

The vulnerability allows an attacker to send crafted requests that cause the Apache OFBiz server to initiate HTTP requests to attacker-controlled destinations. Because the server originates these requests, they bypass perimeter controls and can reach internal-only systems. SSRF is tracked as CWE-918.

The attack requires no authentication and no user interaction. An adversary needs only network reachability to the OFBiz web tier. Successful exploitation impacts confidentiality by exposing data that internal services return to the OFBiz process.

Typical SSRF exploitation against enterprise applications targets cloud instance metadata services, internal administrative APIs, and unauthenticated services that trust requests originating from the application tier. The EPSS score is 0.076% with a percentile of 22.7 as of 2026-05-21, indicating low observed exploitation activity at publication.

Root Cause

The root cause is insufficient validation of user-supplied URLs or hostnames passed to server-side HTTP client functions inside Apache OFBiz. The application does not adequately restrict the schemes, hosts, or IP address ranges that the server is permitted to contact. Refer to the Apache Security Mailing List Thread for upstream details.

Attack Vector

The attack vector is network-based. An attacker submits a request to an exposed OFBiz endpoint containing a URL parameter that the server subsequently fetches. The server returns or processes the response from the attacker-supplied target. Adversaries commonly point the request at http://169.254.169.254/ to retrieve cloud metadata, at http://127.0.0.1/ to reach loopback-bound admin services, or at private RFC 1918 ranges to enumerate internal hosts.

No verified public exploit code is available. The vulnerability mechanism is documented in the Openwall OSS Security Discussion.

Detection Methods for CVE-2026-31910

Indicators of Compromise

• Outbound HTTP requests from the OFBiz application server to internal IP ranges, loopback addresses, or cloud metadata endpoints such as 169.254.169.254
• Web access logs showing requests to OFBiz endpoints containing URL-like parameters pointing to internal hosts
• Unexpected DNS lookups from the OFBiz host for attacker-controlled or internal hostnames

Detection Strategies

• Inspect OFBiz access logs for request parameters containing http://, https://, file://, or gopher:// schemes followed by internal or metadata addresses
• Correlate inbound web requests with outbound connections initiated by the OFBiz Java process to identify request-induced fetches
• Deploy network monitoring rules that flag application-tier hosts contacting cloud metadata services or private network ranges

Monitoring Recommendations

• Forward OFBiz application and web server logs to a centralized analytics platform for retention and query
• Monitor egress traffic from OFBiz instances and alert on connections that violate expected destination policies
• Track changes to OFBiz versions and patch state across the fleet to identify unpatched instances

How to Mitigate CVE-2026-31910

Immediate Actions Required

• Upgrade Apache OFBiz to version 24.09.06 or later as recommended by the Apache Software Foundation
• Restrict network egress from OFBiz servers to only the destinations required for business operations
• Block OFBiz hosts from reaching cloud instance metadata endpoints unless explicitly required
• Place OFBiz behind a web application firewall and inspect parameters that accept URLs

Patch Information

Apache has released Apache OFBiz 24.09.06 which fixes CVE-2026-31910. Administrators should review the Apache Security Mailing List Thread for upgrade guidance and validate the patch in a staging environment before production rollout.

Workarounds

• Apply egress filtering at the network layer to deny OFBiz hosts from initiating connections to RFC 1918, loopback, and link-local address ranges
• Use an outbound proxy that enforces an allowlist of approved external destinations for OFBiz
• Limit exposure of the OFBiz web tier to trusted networks until the upgrade is applied

# Example iptables rules to block SSRF-targeted ranges from the OFBiz host
iptables -A OUTPUT -d 169.254.169.254 -j DROP
iptables -A OUTPUT -d 127.0.0.0/8 ! -o lo -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