Quick answers
- Is CVE-2026-91641 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-91641 being exploited in the wild.
- How severe is CVE-2026-91641?
- Medium severity, with a CVSS score of 5, published 20 October 2026.
- Which products and versions are affected?
- Oracle Essbase 21.8.3.0.0.
- Is there a fix for CVE-2026-91641?
- 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-2026-91641 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-91641?
- 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
A low-privilege network-accessible flaw in Oracle Essbase version 21.8.3.0.0 allows HTTP-based exploitation without user interaction. Attackers with valid low-level credentials can leverage this vulnerability to gain unauthorized read access to data subsets, with scope change indicating secondary systems may be impacted. A fix status is unknown from the advisory.
Affected products
- Oracle Essbase 21.8.3.0.0
Timeline
- 2026-10-20: disclosed