Quick answers
- Is CVE-2026-91590 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-91590 being exploited in the wild.
- How severe is CVE-2026-91590?
- Medium severity, with a CVSS score of 5.4, published 20 October 2026.
- Which products and versions are affected?
- Oracle BI Publisher 8.2.0.0.0, 26.01.0.0.0.
- Is there a fix for CVE-2026-91590?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-91590 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-91590?
- Check whether you run Oracle BI Publisher at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A low-privileged network-accessible vulnerability in Oracle BI Publisher's Web Service API allows unauthorized data access and modification (CWE-639: Authorization Bypass). The attack requires HTTP network access and user interaction from a legitimate user. Successful exploitation grants unauthorized read access to a subset of BI Publisher data and unauthorized update/insert/delete access to some accessible data, with potential scope change to other products.
Affected products
- Oracle BI Publisher 8.2.0.0.0, 26.01.0.0.0
Timeline
- 2026-10-20: disclosed