# CVE-2026-101391: Oracle Siebel CRM Marketing cross-site request forgery

Source: https://junglewise.ai/threats/cve-2026-101391-vulnerability-in-the-siebel-apps-marketing-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-2026-101391 · Severity: medium · CVSS 6.1 · Published 2026-10-20

Oracle Siebel CRM's Marketing component is vulnerable to a cross-site attack that allows an unauthenticated attacker to trick authorized users into modifying or viewing sensitive CRM data. An attacker can craft a malicious web page that, when visited by a legitimate Siebel user, performs unauthorized actions like creating, modifying, or deleting marketing records. This could lead to data corruption, loss of marketing campaigns, and unauthorized access to customer information.

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

## Quick answers

**Is CVE-2026-101391 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-101391 being exploited in the wild.

**How severe is CVE-2026-101391?** Medium severity, with a CVSS score of 6.1, published 20 October 2026.

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

**Is there a fix for CVE-2026-101391?** 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-2026-101391 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-101391?** Check whether you run Oracle Siebel CRM 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 Oracle Siebel CRM's Marketing component allows unauthenticated network attackers to perform unauthorized data operations via HTTP. The attack requires user interaction (victim must visit a malicious page or link) and is classified as a scope-change vulnerability affecting confidentiality and integrity. The vulnerability impacts Siebel versions 17.0 through 26.9 and may affect additional Oracle products.

## Affected products

- Oracle Siebel CRM 17.0-26.9

## Timeline

- 2026-10-20: disclosed

## References

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

## Related threats

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- [Oracle Siebel CRM Financial Accounts unauthorized data access](https://junglewise.ai/threats/cve-2026-91430-vulnerability-in-the-siebel-apps-financial-services-product-of)
- [Oracle Siebel CRM Server Infrastructure privilege escalation](https://junglewise.ai/threats/cve-2026-91423-vulnerability-in-the-siebel-crm-deployment-product-of-oracle)
- [Oracle Siebel CRM information disclosure in Management Console](https://junglewise.ai/threats/cve-2026-101448-vulnerability-in-the-siebel-crm-deployment-product-of-oracle)
- [Oracle Siebel CRM Apps - Marketing cross-site request forgery in Email Marketing](https://junglewise.ai/threats/cve-2026-101408-vulnerability-in-the-siebel-apps-marketing-product-of-oracle)