Quick answers
- Is CVE-2026-91431 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-91431 being exploited in the wild.
- How severe is CVE-2026-91431?
- Medium severity, with a CVSS score of 5.5, published 20 October 2026.
- Which products and versions are affected?
- Oracle Siebel CRM End User 17.0 through 26.9.
- Is there a fix for CVE-2026-91431?
- 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-2026-91431 attacked?
- It is attacked with local access, in a web application.
- Am I affected by CVE-2026-91431?
- Check whether you run Oracle Siebel CRM End User 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 local privilege escalation vulnerability in the Open UI component of Oracle Siebel CRM allows a low-privileged attacker to gain unauthorized read access to sensitive data. The attack requires logon access to the infrastructure where Siebel CRM End User executes and local code execution capability, resulting in complete confidentiality compromise with no integrity or availability impact.
Affected products
- Oracle Siebel CRM End User 17.0 through 26.9
Timeline
- 2026-10-20: disclosed