CVE-2026-31378: Apache OFBiz Input Validation Vulnerability

CVE-2026-31378 Overview

CVE-2026-31378 is an improper input validation vulnerability [CWE-20] in Apache OFBiz, the open-source enterprise resource planning (ERP) framework. The flaw affects all Apache OFBiz versions prior to 24.09.06. A remote attacker can exploit the issue over the network without authentication or user interaction. Successful exploitation leads to limited disclosure of confidential information and limited integrity impact on the affected system. The Apache OFBiz project has released version 24.09.06 to remediate the issue.

Critical Impact

Unauthenticated network attackers can submit crafted input to Apache OFBiz instances and obtain limited access to confidential data and modify application state.

Affected Products

• Apache OFBiz versions prior to 24.09.06
• Apache OFBiz deployments exposed to untrusted networks
• Downstream applications and integrations built on vulnerable OFBiz releases

Discovery Timeline

• 2026-05-19 - CVE-2026-31378 published to the National Vulnerability Database (NVD)
• 2026-05-19 - Apache project disclosed the issue on the developer mailing list
• 2026-05-19 - Last updated in NVD database

Technical Details for CVE-2026-31378

Vulnerability Analysis

The vulnerability stems from improper input validation [CWE-20] within Apache OFBiz request handling logic. The application does not sufficiently validate attacker-controlled input before processing it through internal components. Because the attack vector is network-based and requires no privileges or user interaction, an attacker can reach the vulnerable code path remotely. The defect results in limited confidentiality and integrity impact, with no direct effect on availability.

Apache OFBiz is widely deployed in production ERP, CRM, and e-commerce environments. Exposed OFBiz instances often process orders, customer data, and accounting records, which raises the practical impact of even limited information exposure. The EPSS dataset places the probability of exploitation at 0.185%, but defenders should not rely on EPSS alone when the service is internet-facing.

Root Cause

The root cause is insufficient validation of untrusted input reaching a parsing or processing routine in OFBiz. Specific function names and parameter details are not published in the public advisory. The vendor identifies the weakness category as CWE-20, indicating the application accepts malformed or unexpected data and uses it in a security-relevant operation.

Attack Vector

Exploitation occurs over the network against the OFBiz HTTP interface. The attacker sends crafted requests to a vulnerable endpoint without authenticating. Successful processing of the malformed input causes the application to return information or accept changes the attacker should not be able to influence. Refer to the Apache Mailing List Post and Openwall OSS-Security Update for vendor-supplied technical context.

No public proof-of-concept exploit is currently available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

Detection Methods for CVE-2026-31378

Indicators of Compromise

• Anomalous HTTP requests targeting OFBiz controller endpoints with malformed parameters or unexpected content types
• Application log entries showing parsing errors, stack traces, or unexpected exceptions from OFBiz request handlers
• Outbound or internal access patterns inconsistent with normal ERP user workflows following inbound requests to OFBiz

Detection Strategies

• Inventory all Apache OFBiz deployments and compare installed versions against 24.09.06 to identify vulnerable hosts
• Inspect web server and application logs for repeated requests to OFBiz endpoints that return server errors or unusually large responses
• Deploy web application firewall (WAF) rules that flag requests with malformed parameters reaching OFBiz controllers

Monitoring Recommendations

• Forward OFBiz application and access logs to a centralized SIEM for correlation across hosts
• Alert on authentication-less requests that trigger administrative or data-export controllers
• Track process and network telemetry from OFBiz Java processes to detect post-exploitation behavior such as unexpected child processes or outbound connections

How to Mitigate CVE-2026-31378

Immediate Actions Required

• Upgrade Apache OFBiz to version 24.09.06 or later on all production and non-production instances
• Restrict network exposure of OFBiz administrative and API endpoints to trusted networks or VPN users
• Audit OFBiz access logs since the disclosure date for evidence of probing or anomalous requests

Patch Information

The Apache OFBiz project has released version 24.09.06, which fixes the improper input validation flaw. Administrators should follow the upgrade instructions referenced in the Apache Mailing List Post. Validate the upgrade in a staging environment before applying it to production, and confirm that custom extensions remain compatible with 24.09.06.

Workarounds

• Place a reverse proxy or WAF in front of OFBiz to filter malformed or unexpected request parameters
• Disable or restrict access to OFBiz components and endpoints not required for business operations
• Enforce network-level allow lists for management interfaces until patching is complete

# Configuration example: verify installed Apache OFBiz version
cd /opt/ofbiz
cat VERSION 2>/dev/null || ./gradlew -q properties | grep -i version

# Restrict OFBiz HTTPS port to trusted CIDR via iptables until patched
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP