CVE-2026-62623: Oracle Reports Developer Auth Bypass Flaw

CVE-2026-62623 Overview

CVE-2026-62623 is an adjacent-network vulnerability in the Oracle Reports Developer product of Oracle Fusion Middleware, within the Security and Authentication component. The affected version is 12.2.1.19.0. An unauthenticated attacker with access to the physical communication segment attached to the hardware running Oracle Reports Developer can compromise the product. Successful exploitation results in full takeover of Oracle Reports Developer, impacting confidentiality, integrity, and availability. Oracle disclosed the issue in its August 2026 Critical Patch Update Security Alert.

Critical Impact
Unauthenticated adjacent-network attackers can take over Oracle Reports Developer, exposing report data and enabling arbitrary configuration or code changes within the middleware environment.

Affected Products

Oracle Fusion Middleware — Oracle Reports Developer
Oracle Reports Developer version 12.2.1.19.0
Security and Authentication component of Oracle Reports Developer

Discovery Timeline

2026-08-18 - CVE-2026-62623 published to NVD
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-62623

Vulnerability Analysis

The flaw resides in the Security and Authentication component of Oracle Reports Developer. It allows an unauthenticated attacker on the same physical or logical network segment as the target host to compromise the service. Oracle classifies the issue as easily exploitable, requiring no privileges and no user interaction. Successful exploitation yields complete takeover of the Oracle Reports Developer instance, granting the attacker the ability to read, modify, or disrupt report processing workflows. The EPSS score is 0.272% (19.7th percentile) at publication, indicating currently low observed exploitation likelihood.

Root Cause

Oracle has not published a detailed technical breakdown. Based on the component and CVSS metrics, the defect resides in the authentication or trust boundary logic of the Security and Authentication component, permitting an adjacent attacker to bypass authentication controls and gain administrative access to the service. See the Oracle Security Alert for vendor guidance.

Attack Vector

The attack vector is Adjacent Network. An attacker must have access to the local broadcast domain, VLAN, or physical segment where the Oracle Reports Developer host resides. Once on the segment, the attacker sends crafted requests to the Reports Developer service without needing credentials or user interaction. No public proof-of-concept, exploit code, or CISA KEV listing exists at the time of publication.

No verified exploitation code has been released. See the Oracle Security Alert for technical guidance.

Detection Methods for CVE-2026-62623

Indicators of Compromise

Unexpected authentication events or administrative sessions on the Oracle Reports Developer service originating from local network peers.
Modification of report definitions, output files, or Reports Developer configuration outside change-management windows.
New or unrecognized processes spawned by the Reports Developer service account on the middleware host.

Detection Strategies

Monitor Oracle Fusion Middleware audit logs for unauthenticated access attempts against the Security and Authentication component of Reports Developer.
Baseline network traffic to Reports Developer listener ports and alert on connections from hosts that do not normally communicate with the middleware tier.
Correlate host-based telemetry with network flows to identify lateral movement from the same VLAN toward the Reports Developer host.

Monitoring Recommendations

Enable verbose authentication logging in Oracle Reports Developer and forward events to a centralized SIEM for review.
Track process, file, and configuration changes on middleware hosts running version 12.2.1.19.0.
Alert on outbound connections initiated by the Reports Developer service account, which typically should not originate external traffic.

How to Mitigate CVE-2026-62623

Immediate Actions Required

Apply the fixes referenced in the Oracle Security Alert for the August 2026 Critical Patch Update.
Restrict network access to Oracle Reports Developer hosts using VLAN segmentation, firewall rules, and host-based ACLs so that only authorized management systems can reach the service.
Inventory all Oracle Fusion Middleware deployments and confirm which instances run Reports Developer 12.2.1.19.0.

Patch Information

Oracle addressed CVE-2026-62623 in its August 2026 Critical Patch Update Security Alert. Administrators should download and apply the relevant patch for Oracle Reports Developer 12.2.1.19.0 as documented in the Oracle Security Alert. Apply the patch in test environments before rolling it into production middleware tiers.

Workarounds

Place Reports Developer hosts on isolated management VLANs with strict ingress filtering until patching is complete.
Disable or firewall the Security and Authentication component's listener from untrusted adjacent hosts where feasible.
Enforce network access control (802.1X, MAC filtering) on segments hosting Oracle Fusion Middleware to prevent unauthorized devices from reaching the service.

bash

# Configuration example: restrict adjacent access to the Reports Developer host
# Replace <REPORTS_HOST> and <MGMT_SUBNET> with environment-specific values
iptables -A INPUT -p tcp -s <MGMT_SUBNET> -d <REPORTS_HOST> --dport 7777 -j ACCEPT
iptables -A INPUT -p tcp -d <REPORTS_HOST> --dport 7777 -j DROP