CVE-2026-62631: Oracle Reports Developer Auth Bypass Flaw

CVE-2026-62631 Overview

CVE-2026-62631 is a vulnerability in the Oracle Reports Developer product of Oracle Fusion Middleware, specifically within the Security and Authentication component. The affected supported version is 14.1.2.0.0. An unauthenticated attacker with access to the same physical communication segment as the target host can exploit this flaw to compromise Oracle Reports Developer. Successful exploitation results in complete takeover of the product, with high impact to confidentiality, integrity, and availability. Oracle addressed the issue in the Oracle Security Alert CSPUAug2026.

Critical Impact
An adjacent-network attacker without credentials can fully take over Oracle Reports Developer 14.1.2.0.0, compromising confidentiality, integrity, and availability.

Affected Products

Oracle Fusion Middleware — Oracle Reports Developer
Affected supported version: 14.1.2.0.0
Component: Security and Authentication

Discovery Timeline

2026-08-18 - CVE-2026-62631 published to NVD
2026-08-18 - Oracle publishes Security Alert CSPUAug2026 addressing the issue
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-62631

Vulnerability Analysis

CVE-2026-62631 resides in the Security and Authentication component of Oracle Reports Developer, part of Oracle Fusion Middleware. Oracle classifies the flaw as easily exploitable and reachable without authentication. The attacker must, however, share the physical communication segment attached to the hardware where Oracle Reports Developer executes. Successful exploitation results in a full compromise of the Reports Developer service.

The EPSS score is 0.321% (25th percentile), indicating low observed exploitation likelihood at publication. That signal does not diminish the impact: Oracle reports full loss of confidentiality, integrity, and availability upon compromise. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog and no public proof-of-concept is available.

Root Cause

Oracle has not published detailed root cause information beyond the affected component. The flaw sits in the Security and Authentication subsystem of Oracle Reports Developer, suggesting an authentication or trust-boundary weakness reachable from adjacent hosts on the same network segment. Refer to the Oracle Security Alert CSPUAug2026 for vendor-supplied technical details.

Attack Vector

The attack requires adjacent network access, meaning the attacker must reside on the same broadcast or logical segment as the target host. No user interaction is required, and no privileges are needed prior to exploitation. Attack complexity is low, and the scope of the impact remains within the vulnerable component. Because the vector is adjacent, remote internet-based exploitation is not possible without prior foothold on an adjacent host.

No verified exploitation code is publicly available. See the Oracle Security Alert CSPUAug2026 for vendor guidance and patch mapping.

Detection Methods for CVE-2026-62631

Indicators of Compromise

Unexpected authentication events or session artifacts on Oracle Reports Developer 14.1.2.0.0 hosts originating from adjacent hosts on the same VLAN or subnet.
New or modified reports, output files, or configuration on the Reports Developer server without an associated administrative change record.
Outbound connections from the Reports Developer host to unfamiliar internal or external endpoints following adjacent-network activity.

Detection Strategies

Inventory Oracle Fusion Middleware deployments and flag hosts running Oracle Reports Developer 14.1.2.0.0 for prioritized monitoring until patched.
Correlate authentication logs with network flow data to identify unauthenticated access attempts sourced from adjacent segments.
Baseline expected process, file, and network behavior of the Reports Developer service and alert on deviations.

Monitoring Recommendations

Enable verbose logging on the Security and Authentication component of Oracle Reports Developer and forward logs to a centralized SIEM.
Monitor Layer 2 and Layer 3 traffic to Reports Developer hosts for anomalous ARP activity, rogue devices, and unexpected peer connections.
Track patch state of Oracle Fusion Middleware assets and alert when hosts drift from the CSPUAug2026 baseline.

How to Mitigate CVE-2026-62631

Immediate Actions Required

Apply the fixes distributed with the Oracle Security Alert CSPUAug2026 to all Oracle Reports Developer 14.1.2.0.0 deployments.
Restrict network access to Reports Developer hosts so that only trusted administrative segments can reach them.
Audit which systems and users currently share the physical or logical segment with Reports Developer servers and remove unnecessary peers.

Patch Information

Oracle released fixes for CVE-2026-62631 as part of the CSPUAug2026 security alert cycle. Administrators should map the alert's patch bundles to their Oracle Fusion Middleware inventory and apply the corresponding update for Oracle Reports Developer 14.1.2.0.0. Consult the Oracle Security Alert CSPUAug2026 for the authoritative patch matrix and any prerequisite updates.

Workarounds

Segment Oracle Reports Developer hosts onto dedicated VLANs with strict Layer 2 and Layer 3 access controls until patching is complete.
Enforce network access control (NAC) or 802.1X on segments hosting Reports Developer to block unauthorized adjacent devices.
Disable or firewall off non-essential listening services on Reports Developer hosts to reduce exposure on the shared segment.

bash

# Example: restrict access to the Reports Developer host with iptables,
# allowing only a trusted administrative subnet on the adjacent segment.
iptables -A INPUT -s 10.10.20.0/24 -p tcp --dport 7002 -j ACCEPT
iptables -A INPUT -p tcp --dport 7002 -j DROP