CVE-2026-31379: Apache OFBiz XSS Vulnerability

CVE-2026-31379 Overview

CVE-2026-31379 affects Apache OFBiz, an open-source enterprise resource planning (ERP) platform. The vulnerability combines three distinct input validation weaknesses: Cross-Site Scripting (XSS), Path Traversal [CWE-22], and Code Injection. All versions of Apache OFBiz prior to 24.09.06 are affected. The Apache OFBiz project released version 24.09.06 to remediate the issue.

The flaw requires user interaction for successful exploitation and operates over the network without authentication. Successful exploitation can lead to limited compromise of confidentiality and integrity within the affected web application context.

Critical Impact

Unauthenticated attackers can deliver malicious payloads through crafted requests to inject scripts, traverse directories, or execute code within the Apache OFBiz application when a user is lured to interact with attacker-controlled content.

Affected Products

• Apache OFBiz versions prior to 24.09.06
• All deployments exposing OFBiz web interfaces to untrusted networks
• ERP, CRM, and e-commerce implementations built on Apache OFBiz

Discovery Timeline

• 2026-05-19 - CVE-2026-31379 published to NVD
• 2026-05-19 - Last updated in NVD database

Technical Details for CVE-2026-31379

Vulnerability Analysis

CVE-2026-31379 bundles three input validation weaknesses within Apache OFBiz request handling. The Cross-Site Scripting component arises from improper neutralization of user-supplied input during web page generation. The Path Traversal weakness, tracked as [CWE-22], permits attackers to reference files outside the intended directory using crafted path sequences. The Code Injection component enables an attacker to influence dynamic code generation paths.

Apache OFBiz exposes numerous controllers, screen renderers, and form widgets that process untrusted parameters. When these components fail to sanitize input before rendering output or constructing file paths, attacker-controlled data flows into sensitive sinks. The attack chain requires user interaction, such as clicking a crafted link, and the scope change indicates that exploitation can affect resources beyond the vulnerable component.

Root Cause

The root cause lies in insufficient input neutralization across multiple request-handling code paths in Apache OFBiz. Parameters supplied in HTTP requests reach output encoding routines, file system access routines, and dynamic execution routines without adequate filtering. The shared theme across all three weaknesses is missing or incomplete validation of untrusted strings.

Attack Vector

An attacker delivers a crafted URL or HTTP request targeting a vulnerable OFBiz endpoint. The victim, typically an authenticated OFBiz user, interacts with the link. The server processes the malicious input, executing the injected script in the browser, accessing files outside the permitted directory, or evaluating attacker-supplied code. Network-based exploitation makes internet-facing OFBiz deployments the highest-risk targets.

No verified public proof-of-concept code is available at this time. Refer to the Apache Mailing List Discussion for vendor details.

Detection Methods for CVE-2026-31379

Indicators of Compromise

• HTTP requests containing path traversal sequences such as ../ or URL-encoded equivalents (%2e%2e%2f) targeting OFBiz endpoints
• Request parameters containing <script> tags, JavaScript event handlers, or template expression syntax
• Outbound connections from the OFBiz Java process to unexpected destinations following anomalous requests
• Unexpected file reads from OFBiz worker threads outside the standard application directories

Detection Strategies

• Inspect web server and application logs for requests containing encoded traversal patterns or script payloads against OFBiz controllers
• Deploy web application firewall rules that flag suspicious parameter values directed at OFBiz screen and form endpoints
• Monitor the OFBiz JVM for unusual child process creation or runtime code evaluation activity

Monitoring Recommendations

• Centralize OFBiz access and error logs and alert on repeated 4xx/5xx responses tied to crafted parameter inputs
• Track file system access by the OFBiz service account and alert on reads outside ${ofbiz.home} subdirectories
• Baseline normal request patterns to OFBiz endpoints and alert on anomalous URL structures or oversized parameters

How to Mitigate CVE-2026-31379

Immediate Actions Required

• Upgrade Apache OFBiz to version 24.09.06 or later as recommended by the project maintainers
• Restrict network access to OFBiz administrative interfaces using firewall rules or reverse proxy access controls
• Review web server logs for prior exploitation attempts using traversal or scripting payloads
• Rotate session tokens and credentials if exploitation indicators are observed

Patch Information

The Apache OFBiz project addressed CVE-2026-31379 in version 24.09.06. Administrators should apply the upgrade following the standard OFBiz deployment process. Refer to the Apache Mailing List Discussion and the OpenWall OSS Security Update for vendor guidance.

Workarounds

• Place the OFBiz application behind a web application firewall configured with rules blocking traversal sequences and script payloads
• Limit OFBiz exposure to trusted networks or VPN access where business requirements permit
• Disable unused OFBiz components and endpoints to reduce the available attack surface until the upgrade is applied

# Configuration example: upgrade Apache OFBiz to the fixed release
git fetch --all --tags
git checkout release24.09
git pull origin release24.09
./gradlew cleanAll loadDefault
./gradlew ofbiz