Quick answers
- Is CVE-2026-91438 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-91438 being exploited in the wild.
- How severe is CVE-2026-91438?
- High severity, with a CVSS score of 7.1, published 20 October 2026.
- Which products and versions are affected?
- Oracle Siebel CRM Deployment 17.0-26.9.
- Is there a fix for CVE-2026-91438?
- 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-2026-91438 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-91438?
- 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
A vulnerability in the Server Infrastructure component of Siebel CRM Deployment allows low-privileged authenticated attackers with network access via HTTP to bypass authorization controls. The flaw permits unauthorized read access to confidential data and write/delete access to some database records. Affected versions range from 17.0 through 26.9.
Affected products
- Oracle Siebel CRM Deployment 17.0-26.9
Timeline
- 2026-10-20: disclosed