CVE-2026-91608 in BI Publisher
Summary
by MITRE • 10/22/2026
Vulnerability in the Oracle BI Publisher product of Oracle Analytics (component: Web Server). Supported versions that are affected are 8.2.0.0.0, 12.2.1.4.0 and 26.01.0.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle BI Publisher. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle BI Publisher accessible data. CVSS 3.1 Base Score 7.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
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Analysis
by VulDB Data Team • 10/22/2026
The identified vulnerability resides within the Web Server component of Oracle BI Publisher, a critical reporting and analytics tool included in the Oracle Analytics suite. This security flaw affects multiple supported versions, specifically 8.2.0.0.0, 12.2.1.4.0, and 26.01.0.0.0. The nature of this vulnerability is particularly concerning because it allows for exploitation by an unauthenticated attacker who requires only network access via HTTP to initiate a successful attack vector. This low barrier to entry significantly increases the risk surface, as no valid credentials or user interaction are necessary to trigger the exploit.
From a technical perspective, the flaw enables unauthorized access to sensitive information stored within the BI Publisher environment. The operational impact is severe, characterized by high confidentiality impacts where an attacker can gain either partial or complete control over accessible data. In cases of partial compromise, critical business intelligence reports and underlying datasets may be exfiltrated without detection. In more extreme scenarios, the vulnerability grants comprehensive access to all Oracle BI Publisher accessible data, effectively bypassing existing authentication mechanisms designed to protect organizational insights and proprietary information.
This incident aligns with CWE-287, which describes Improper Authentication, as well as CWE-359, Exposed Private Information, given the resulting unauthorized disclosure of sensitive content. In terms of adversary tactics, this vulnerability facilitates early access in the MITRE ATT&CK framework, specifically under techniques related to Initial Access and Credential Access if further lateral movement is attempted using harvested data. The CVSS 3.1 base score of 7.5 reflects a High severity rating driven primarily by the network-based attack vector, low complexity requirements, lack of required privileges for the attacker, and unchanged scope with high confidentiality impact.
To mitigate this risk, organizations must apply the latest security patches provided by Oracle immediately to all affected instances of BI Publisher. It is also advisable to restrict direct HTTP access to the Web Server component through network segmentation or firewall rules, ensuring that only authorized management networks can interact with these services. Additionally, implementing strict input validation and monitoring for anomalous request patterns can help detect potential exploitation attempts in real-time while patching efforts are underway.