# CVE-2026-91257: Oracle E-Business Suite iSupport unauthorized data access in Service Requests

Source: https://junglewise.ai/threats/cve-2026-91257-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-2026-91257 · Severity: medium · CVSS 6.5 · Published 2026-10-20

A vulnerability in Oracle E-Business Suite's iSupport component allows authenticated users with low privileges to gain unauthorized access to sensitive customer service data. Attackers can view critical information or complete datasets within iSupport without proper authorization through a network-based exploit requiring only low privileges and HTTP access.

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-2026-91257 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91257 being exploited in the wild.

**How severe is CVE-2026-91257?** Medium severity, with a CVSS score of 6.5, published 20 October 2026.

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

**Is there a fix for CVE-2026-91257?** 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-2026-91257 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-91257?** 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

An easily exploitable authorization flaw in the Service Requests component of Oracle E-Business Suite's iSupport module allows a low-privileged attacker with network access via HTTP to bypass access controls and read confidential data. The vulnerability requires the attacker to already be authenticated but does not require user interaction. Successful exploitation results in unauthorized disclosure of sensitive iSupport data but does not permit modification or availability disruption.

## Affected products

- Oracle E-Business Suite iSupport 12.2.3 to 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 modification](https://junglewise.ai/threats/cve-2026-91338-vulnerability-in-the-isupport-product-of-oracle-e-business-suite)