# CVE-2026-91338: Oracle E-Business Suite iSupport unauthorized data modification

Source: https://junglewise.ai/threats/cve-2026-91338-vulnerability-in-the-isupport-product-of-oracle-e-business-suite  
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-2026-91338 · Severity: high · CVSS 7.1 · Published 2026-10-20

Oracle E-Business Suite's iSupport component is a module used within enterprise resource planning systems to manage support and customer interactions. A vulnerability allows attackers with low-level network access to create, delete, or modify critical data without authorization, and to read sensitive information. Successful exploitation could compromise the integrity and confidentiality of business-critical support data.

Technologies: [Oracle E-Business Suite iSupport](https://junglewise.ai/threats/technologies/e-business-suite-isupport). Vendors: [Oracle](https://junglewise.ai/threats/vendors/oracle).

## Quick answers

**Is CVE-2026-91338 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91338 being exploited in the wild.

**How severe is CVE-2026-91338?** High severity, with a CVSS score of 7.1, published 20 October 2026.

**Which products and versions are affected?** Oracle E-Business Suite iSupport 12.2.3 through 12.2.15.

**Is there a fix for CVE-2026-91338?** 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-2026-91338 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-91338?** Check whether you run Oracle E-Business Suite iSupport 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 low-privilege network-accessible vulnerability in the iSupport internal operations component allows unauthenticated or minimally authenticated HTTP-based attacks to bypass authorization controls. The flaw permits unauthorized data modification (creation, deletion) and read access to iSupport data. An attacker needs only network access and low privileges to exploit this vulnerability.

## Affected products

- Oracle E-Business Suite iSupport 12.2.3 through 12.2.15

## 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 E-Business Suite iSupport data manipulation and denial of service](https://junglewise.ai/threats/cve-2026-91347-vulnerability-in-the-isupport-product-of-oracle-e-business-suite)
- [Oracle E-Business Suite iSupport information disclosure in Service Requests](https://junglewise.ai/threats/cve-2026-91339-vulnerability-in-the-isupport-product-of-oracle-e-business-suite)
- [Oracle E-Business Suite iSupport unauthorized data access in Service Requests](https://junglewise.ai/threats/cve-2026-91257-vulnerability-in-the-isupport-product-of-oracle-e-business-suite)