# CVE-2026-87359: Oracle Service Bus authentication bypass or privilege escalation

Source: https://junglewise.ai/threats/cve-2026-87359-vulnerability-in-the-oracle-service-bus-product-of-oracle-fusion  
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-2026-87359 · Severity: high · CVSS 8.8 · Published 2026-10-20

Oracle Service Bus, a middleware platform that orchestrates business processes and integrates enterprise systems, contains a flaw that allows an attacker with low-level network access to compromise the entire system. An exploit could enable complete takeover of the Service Bus, affecting all workflows and data it manages.

Technologies: [Oracle Service Bus](https://junglewise.ai/threats/technologies/service-bus). Vendors: [Oracle](https://junglewise.ai/threats/vendors/oracle).

## Quick answers

**Is CVE-2026-87359 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-87359 being exploited in the wild.

**How severe is CVE-2026-87359?** High severity, with a CVSS score of 8.8, published 20 October 2026.

**Which products and versions are affected?** Oracle Service Bus 12.2.1.4.0, 14.1.2.0.0.

**Is there a fix for CVE-2026-87359?** 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-2026-87359 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-87359?** Check whether you run Oracle Service Bus 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 Oracle Service Bus Core component is easily exploitable by a low-privileged attacker with network access via HTTP. The attack requires no user interaction or special conditions, allowing the attacker to gain high-confidence unauthorized control over the Service Bus. Successful exploitation results in complete compromise of confidentiality, integrity, and availability.

## Affected products

- Oracle Service Bus 12.2.1.4.0, 14.1.2.0.0

## 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 Service Bus authentication bypass in HTTP](https://junglewise.ai/threats/cve-2026-87420-vulnerability-in-the-oracle-service-bus-product-of-oracle-fusion)
- [Oracle Service Bus remote code execution via HTTP](https://junglewise.ai/threats/cve-2026-87419-vulnerability-in-the-oracle-service-bus-product-of-oracle-fusion)
- [Oracle Service Bus denial of service in Core](https://junglewise.ai/threats/cve-2026-87369-vulnerability-in-the-oracle-service-bus-product-of-oracle-fusion)
- [Oracle Service Bus remote code execution via HTTP](https://junglewise.ai/threats/cve-2026-87364-vulnerability-in-the-oracle-service-bus-product-of-oracle-fusion)