Quick answers
- Is CVE-2026-91365 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-91365 being exploited in the wild.
- How severe is CVE-2026-91365?
- Medium severity, with a CVSS score of 5.9, published 20 October 2026.
- Which products and versions are affected?
- Oracle Siebel CRM Cloud Applications 22.3 through 26.9.
- Is there a fix for CVE-2026-91365?
- 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-2026-91365 attacked?
- It is attacked from the adjacent network, in a hosted service.
- Am I affected by CVE-2026-91365?
- Check whether you run Oracle Siebel CRM Cloud Applications 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 difficult-to-exploit authentication bypass vulnerability exists in the Siebel Cloud Manager component of Oracle Siebel CRM Cloud Applications. The vulnerability requires physical access to the communication segment (adjacent network access) and allows unauthenticated attackers to gain unauthorized access. Successful exploitation results in high confidentiality impact and limited integrity impact, enabling attackers to read sensitive data and modify some application data.
Affected products
- Oracle Siebel CRM Cloud Applications 22.3 through 26.9
Timeline
- 2026-10-20: disclosed