Quick answers
- Is CVE-2026-91429 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-91429 being exploited in the wild.
- How severe is CVE-2026-91429?
- Medium severity, with a CVSS score of 6.5, published 20 October 2026.
- Which products and versions are affected?
- Oracle Siebel CRM Deployment 17.0 to 26.9.
- Is there a fix for CVE-2026-91429?
- 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-2026-91429 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-91429?
- 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 authentication bypass vulnerability exists in the Siebel CRM Deployment Server Infrastructure component that allows unauthenticated attackers to access the system via HTTP. The vulnerability has high complexity requirements (AC:H) but no authentication or user interaction prerequisites. Successful exploitation results in unauthorized read access to critical data and limited write capabilities (update, insert, delete on some data).
Affected products
- Oracle Siebel CRM Deployment 17.0 to 26.9
Timeline
- 2026-10-20: disclosed