# CVE-2026-91377: Oracle Siebel CRM Integration unauthorized data access via HTTP

Source: https://junglewise.ai/threats/cve-2026-91377-vulnerability-in-the-siebel-crm-integration-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-2026-91377 · Severity: high · CVSS 7.5 · Published 2026-10-20

Oracle Siebel CRM Integration is a component that handles data integration within Siebel CRM systems. An unauthenticated attacker on the network can exploit this vulnerability to gain unauthorized access to sensitive customer relationship management data without needing credentials or user interaction. Successful exploitation allows complete read access to all data stored in the Siebel CRM Integration system.

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

## Quick answers

**Is CVE-2026-91377 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91377 being exploited in the wild.

**How severe is CVE-2026-91377?** High severity, with a CVSS score of 7.5, published 20 October 2026.

**Which products and versions are affected?** Oracle Siebel CRM Integration 25.12-26.9.

**Is there a fix for CVE-2026-91377?** 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-2026-91377 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-91377?** Check whether you run Oracle Siebel CRM Integration 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 Open Integration component of Siebel CRM Integration allows unauthenticated, network-based attackers to gain unauthorized data access via HTTP requests. The vulnerability requires no authentication, user interaction, or privileged account access. Exploitation results in confidentiality breach with complete read access to all accessible CRM data.

## Affected products

- Oracle Siebel CRM Integration 25.12-26.9

## 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 Integration cross-site request forgery in Open Integration](https://junglewise.ai/threats/cve-2026-91378-vulnerability-in-the-siebel-crm-integration-product-of-oracle)
- [Oracle Siebel CRM Integration cross-site request forgery in EAI](https://junglewise.ai/threats/cve-2026-87338-vulnerability-in-the-siebel-crm-integration-product-of-oracle)
- [Oracle Siebel CRM Integration denial of service in EAI](https://junglewise.ai/threats/cve-2026-101508-vulnerability-in-the-siebel-crm-integration-product-of-oracle)
- [Oracle Siebel CRM Open Integration CSRF or XSS vulnerability](https://junglewise.ai/threats/cve-2026-101492-vulnerability-in-the-siebel-crm-integration-product-of-oracle)
- [Oracle Siebel CRM Integration authentication bypass in Open Integration](https://junglewise.ai/threats/cve-2026-83326-oracle-siebel-crm-integration-authentication-bypass-in-open)