Quick answers
- Is CVE-2026-91435 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-91435 being exploited in the wild.
- How severe is CVE-2026-91435?
- Medium severity, with a CVSS score of 6.5, published 20 October 2026.
- Which products and versions are affected?
- Oracle Siebel CRM Deployment 17.0-26.9.
- Is there a fix for CVE-2026-91435?
- 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-2026-91435 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-91435?
- 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 denial-of-service vulnerability exists in the Server Infrastructure component of Siebel CRM Deployment, exploitable via HTTP by a low-privileged authenticated attacker with network access. Successful exploitation causes a hang or repeated crash of the application, resulting in complete availability loss. The vulnerability is easily exploitable with low attack complexity and no user interaction required.
Affected products
- Oracle Siebel CRM Deployment 17.0-26.9
Timeline
- 2026-10-20: disclosed