# CVE-2026-91347: Oracle E-Business Suite iSupport data manipulation and denial of service

Source: https://junglewise.ai/threats/cve-2026-91347-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-2026-91347 · Severity: high · CVSS 8.5 · Published 2026-10-20

Oracle E-Business Suite's iSupport module, which manages service requests, contains a vulnerability that allows attackers with low-level network access to modify or delete critical business data. An attacker can also cause partial service outages, potentially affecting other integrated Oracle E-Business Suite components and disrupting customer support operations.

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-2026-91347 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91347 being exploited in the wild.

**How severe is CVE-2026-91347?** High severity, with a CVSS score of 8.5, published 20 October 2026.

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

**Is there a fix for CVE-2026-91347?** 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-2026-91347 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-91347?** 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

The vulnerability in the Service Requests component of Oracle E-Business Suite iSupport allows low-privileged authenticated attackers to perform unauthorized data manipulation including creation, deletion, and modification of critical data via HTTP. With scope change, successful exploitation can also impact additional E-Business Suite products and cause partial denial of service. The vulnerability requires network access and low privilege credentials but no user interaction.

## Affected products

- Oracle E-Business Suite iSupport 12.2.3-12.2.15

## 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 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)
- [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)