CVE-2026-83307 Overview
CVE-2026-83307 is a high-severity vulnerability in the Oracle BI Publisher product of Oracle Analytics, specifically in the BI Platform Security component. The flaw affects Oracle BI Publisher versions 8.2.0.0.0, 12.2.1.4.0, and 26.01.0.0.0. A low-privileged attacker with network access via HTTP can exploit this vulnerability without user interaction. Successful exploitation results in unauthorized creation, deletion, or modification of critical data, unauthorized read access to all BI Publisher accessible data, and a partial denial of service condition.
Critical Impact
Authenticated attackers with minimal privileges can compromise the confidentiality and integrity of all data accessible to Oracle BI Publisher over the network.
Affected Products
- Oracle BI Publisher 8.2.0.0.0
- Oracle BI Publisher 12.2.1.4.0
- Oracle BI Publisher 26.01.0.0.0
Discovery Timeline
- 2026-09-15 - CVE-2026-83307 published to NVD
- 2026-09-16 - Last updated in NVD database
Technical Details for CVE-2026-83307
Vulnerability Analysis
The vulnerability resides in the BI Platform Security component of Oracle BI Publisher, the enterprise reporting product bundled with Oracle Analytics. An authenticated attacker holding a low-privileged application account can send crafted HTTP requests to compromise the server. The flaw enables horizontal and vertical access to data the attacker should not reach, breaking the authorization boundaries enforced by the platform. Exploitation is straightforward and does not require user interaction, elevated privileges, or specialized conditions on the target host.
Root Cause
Oracle has not disclosed the underlying defect in the BI Platform Security component. Based on the CVSS impact profile, the issue represents a broken access control condition that permits a low-privileged user to bypass authorization checks against data objects managed by BI Publisher. The scope remains unchanged, meaning the impact is contained within the vulnerable component but affects all data reachable through it. Refer to the Oracle Security Alert CSPUSEP2026 for vendor guidance.
Attack Vector
The attack originates over the network through HTTP against the BI Publisher web interface. The attacker must possess a valid low-privileged account on the target instance. Once authenticated, the attacker issues requests that read, modify, or delete data belonging to other users or administrative objects. The same request path can trigger a partial denial of service, degrading availability for legitimate users of the reporting service.
No public proof-of-concept exploit is available at this time, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. The EPSS probability score is 0.419%.
Detection Methods for CVE-2026-83307
Indicators of Compromise
- Unexpected HTTP requests to BI Publisher endpoints from low-privileged user sessions accessing reports or data models outside their normal scope.
- Sudden spikes in read, create, or delete operations against BI Publisher catalog objects.
- Application logs showing authorization decisions granting access to resources that historical baselines exclude for the requesting user.
- Partial service degradation or intermittent 5xx errors from the BI Publisher web tier without infrastructure faults.
Detection Strategies
- Enable BI Publisher audit logging and forward events to a centralized SIEM for correlation against user role baselines.
- Alert on any authenticated user performing bulk catalog operations or accessing report data outside their assigned folders.
- Monitor Oracle WebLogic access logs for anomalous HTTP request patterns targeting BI Publisher servlet paths.
Monitoring Recommendations
- Establish a per-user baseline for report execution volume and catalog access frequency, then alert on deviations.
- Continuously monitor privileged data-store queries initiated from BI Publisher service accounts.
- Track failed and successful authorization events at the BI Platform Security layer for review by the SOC.
How to Mitigate CVE-2026-83307
Immediate Actions Required
- Apply the Oracle patches referenced in the Oracle Security Alert CSPUSEP2026 to all affected BI Publisher installations.
- Inventory all Oracle BI Publisher deployments running versions 8.2.0.0.0, 12.2.1.4.0, or 26.01.0.0.0.
- Review low-privileged accounts on BI Publisher and disable dormant or unnecessary users.
- Restrict network access to the BI Publisher web interface to trusted management networks where feasible.
Patch Information
Oracle addressed CVE-2026-83307 in the security alert bundle CSPUSEP2026. Administrators should download and apply the fixes for their specific version from My Oracle Support and follow the vendor's post-patch validation steps. See the Oracle Security Alert CSPUSEP2026 for the authoritative advisory and download links.
Workarounds
- Place the BI Publisher endpoint behind a web application firewall configured to inspect and rate-limit authenticated requests.
- Enforce least-privilege role assignments and remove unused BI Publisher roles from application users.
- Segment the BI Publisher server so that only vetted client networks and identity providers can reach the HTTP interface.
- Increase audit retention on BI Platform Security events to support post-incident investigation until patching is complete.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.