Quick answers
- Is CVE-2026-91654 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-91654 being exploited in the wild.
- How severe is CVE-2026-91654?
- Medium severity, with a CVSS score of 6.3, published 20 October 2026.
- Which products and versions are affected?
- Oracle Essbase 21.8.3.0.0.
- Is there a fix for CVE-2026-91654?
- 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-2026-91654 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-91654?
- Check whether you run Oracle Essbase 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
An easily exploitable vulnerability in Oracle Essbase's Security component allows a low-privileged attacker with network access via HTTP to gain unauthorized data access and modify or delete records. The vulnerability affects version 21.8.3.0.0 and requires only low privileges and no user interaction. Successful exploitation results in unauthorized read access to sensitive data, write/delete access to some accessible data, and partial denial of service capability.
Affected products
- Oracle Essbase 21.8.3.0.0
Timeline
- 2026-10-20: disclosed