Quick answers
- Is CVE-2026-91359 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-91359 being exploited in the wild.
- How severe is CVE-2026-91359?
- Medium severity, with a CVSS score of 5.3, published 20 October 2026.
- Which products and versions are affected?
- Oracle Siebel CRM Cloud Applications 22.3 through 26.9.
- Is there a fix for CVE-2026-91359?
- 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-2026-91359 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-91359?
- Check whether you run Oracle Siebel CRM Cloud Applications 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 vulnerability in the Siebel Cloud Manager component allows unauthenticated attackers with network access via HTTP to read a subset of Siebel CRM Cloud Applications data. The vulnerability requires no user interaction, no special privileges, and no authentication, making it straightforward to exploit remotely. Successful exploitation results in unauthorized disclosure of confidential information stored in the CRM system.
Affected products
- Oracle Siebel CRM Cloud Applications 22.3 through 26.9
Timeline
- 2026-10-20: disclosed