CVE-2026-31387 Overview
CVE-2026-31387 is an Improper Authentication vulnerability [CWE-287] in Apache OFBiz, an open-source enterprise resource planning (ERP) platform. The flaw affects all versions of Apache OFBiz prior to 24.09.06. An unauthenticated attacker can reach the vulnerable code path over the network without user interaction. Successful exploitation results in limited disclosure of confidential information, but does not impact integrity or availability. The Apache OFBiz project released version 24.09.06 to address the issue.
Critical Impact
Remote, unauthenticated attackers can bypass authentication controls in Apache OFBiz to access information that should require valid credentials.
Affected Products
- Apache OFBiz versions prior to 24.09.06
- Deployments exposing OFBiz web interfaces to untrusted networks
- Downstream applications and integrations built on Apache OFBiz
Discovery Timeline
- 2026-05-19 - CVE-2026-31387 published to the National Vulnerability Database
- 2026-05-19 - Last updated in NVD database
Technical Details for CVE-2026-31387
Vulnerability Analysis
The vulnerability falls under CWE-287: Improper Authentication. Apache OFBiz fails to enforce authentication correctly on at least one network-reachable code path. An attacker can reach functionality that should be restricted to authenticated users. The CVSS vector indicates a network-based attack requiring no privileges and no user interaction. The impact is limited to confidentiality, with no direct effect on integrity or availability of the underlying system.
Apache OFBiz exposes web-based ERP modules covering accounting, e-commerce, manufacturing, and human resources. Authentication flaws in this class of application can expose business records, user data, and configuration metadata. The EPSS data published on 2026-05-21 indicates a low near-term exploitation probability, and no public proof-of-concept code is currently listed.
Root Cause
The root cause is improper enforcement of authentication checks within Apache OFBiz before version 24.09.06. Public advisories do not detail the specific component or endpoint affected. The Apache Software Foundation tracks the fix in version 24.09.06 and recommends upgrading rather than patching individual files. See the Apache Security Mailing List Thread for vendor-supplied details.
Attack Vector
The attack vector is network-based and does not require credentials or user interaction. An attacker sends crafted requests to an exposed Apache OFBiz instance and reaches functionality that should require an authenticated session. Because exploitation does not require prior access, any internet-facing OFBiz deployment running an affected version is reachable. Refer to the Openwall OSS-Security Discussion for community analysis.
No verified exploit code is available at the time of publication, so a sanitized technical walkthrough is not included here. Defenders should treat any anomalous unauthenticated request reaching protected OFBiz endpoints as suspicious.
Detection Methods for CVE-2026-31387
Indicators of Compromise
- Successful HTTP responses to OFBiz endpoints from sources that never completed a login flow
- Unexpected outbound data transfers originating from OFBiz application servers
- Access to OFBiz controller paths from IP addresses outside normal administrative ranges
Detection Strategies
- Inspect OFBiz web server logs for requests to authenticated controllers that lack a preceding login event
- Correlate session identifiers across requests to identify endpoints accessed without an established session
- Compare the running OFBiz version banner against 24.09.06 to identify exposed, unpatched instances
Monitoring Recommendations
- Enable verbose request logging on Apache OFBiz front-end servers and forward logs to a centralized analytics platform
- Alert on spikes in 200-class responses from unauthenticated source IPs to OFBiz application paths
- Track configuration drift on OFBiz hosts to confirm the patched version remains deployed
How to Mitigate CVE-2026-31387
Immediate Actions Required
- Upgrade all Apache OFBiz instances to version 24.09.06 or later
- Inventory internet-exposed OFBiz deployments and prioritize them for patching
- Review web server and application logs for unauthenticated access to protected endpoints since the last known-good baseline
Patch Information
The Apache OFBiz project fixed CVE-2026-31387 in version 24.09.06. Administrators should upgrade following the official release notes published on the Apache Security Mailing List Thread. No backported patches for earlier branches are referenced in the advisory.
Workarounds
- Restrict network access to Apache OFBiz administrative interfaces using firewall rules or VPN-only access
- Place OFBiz behind a reverse proxy that enforces authentication at the perimeter
- Disable unused OFBiz components and endpoints to reduce the reachable attack surface
# Example: restrict OFBiz access to trusted management network using iptables
iptables -A INPUT -p tcp --dport 443 -s 10.10.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
