# CVE-2026-91449: Oracle Siebel CRM Deployment unauthorized data access via HTTP

Source: https://junglewise.ai/threats/cve-2026-91449-vulnerability-in-the-siebel-crm-deployment-product-of-oracle  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-20. Updated: 2026-10-20  
License: CC BY 4.0 with a link back

CVE-2026-91449 · Severity: high · CVSS 7.4 · Published 2026-10-20

Oracle Siebel CRM Deployment is a customer relationship management system used to manage critical business data. An unauthenticated attacker on the network can exploit a difficult-to-exploit vulnerability in the server infrastructure to read, modify, or delete sensitive customer and business information without proper authorization.

Technologies: [Oracle Siebel CRM Deployment](https://junglewise.ai/threats/technologies/siebel-crm-deployment). Vendors: [Oracle](https://junglewise.ai/threats/vendors/oracle).

## Quick answers

**Is CVE-2026-91449 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91449 being exploited in the wild.

**How severe is CVE-2026-91449?** High severity, with a CVSS score of 7.4, published 20 October 2026.

**Which products and versions are affected?** Oracle Siebel CRM Deployment 17.0 through 26.9.

**Is there a fix for CVE-2026-91449?** 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-2026-91449 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-91449?** 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 or authorization flaw in the Server Infrastructure component of Oracle Siebel CRM Deployment allows an unauthenticated attacker with network access via HTTP to gain unauthorized read and write access to sensitive data. The vulnerability is difficult to exploit, suggesting specific preconditions or timing are required. Successful exploitation results in confidentiality and integrity compromise of critical business data managed by the CRM system.

## Affected products

- Oracle Siebel CRM Deployment 17.0 through 26.9

## Timeline

- 2026-10-20: disclosed

## References

- [https://www.oracle.com/security-alerts/cpuoct2026.html](https://www.oracle.com/security-alerts/cpuoct2026.html)

## Related threats

- [Oracle Siebel CRM unauthorized data access in Server Infrastructure](https://junglewise.ai/threats/cve-2026-91450-vulnerability-in-the-siebel-crm-deployment-product-of-oracle)
- [Oracle Siebel CRM Deployment unauthenticated data access](https://junglewise.ai/threats/cve-2026-91448-vulnerability-in-the-siebel-crm-deployment-product-of-oracle)
- [Oracle Siebel CRM Deployment unauthorized data access](https://junglewise.ai/threats/cve-2026-91447-vulnerability-in-the-siebel-crm-deployment-product-of-oracle)
- [Oracle Siebel CRM privilege escalation in Server Infrastructure](https://junglewise.ai/threats/cve-2026-91444-vulnerability-in-the-siebel-crm-deployment-product-of-oracle)
- [Oracle Siebel CRM Deployment unauthorized data access in Server Infrastructure](https://junglewise.ai/threats/cve-2026-91443-vulnerability-in-the-siebel-crm-deployment-product-of-oracle)