Quick answers
- Is CVE-2026-91450 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-91450 being exploited in the wild.
- How severe is CVE-2026-91450?
- High severity, with a CVSS score of 7.4, published 20 October 2026.
- Which products and versions are affected?
- Oracle Siebel CRM Deployment 17.0-26.9.
- Is there a fix for CVE-2026-91450?
- 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-2026-91450 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-91450?
- Check whether you run Oracle Siebel CRM Deployment 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 unauthenticated, network-reachable vulnerability in the Server Infrastructure component of Siebel CRM Deployment allows attackers to bypass authorization controls via HTTP. The attack is difficult to exploit (high complexity) but can result in both confidential data disclosure and unauthorized modification of critical data. The vulnerability affects versions 17.0 through 26.9.
Affected products
- Oracle Siebel CRM Deployment 17.0-26.9
Timeline
- 2026-10-20: disclosed