# CVE-2026-87369: Oracle Service Bus denial of service in Core

Source: https://junglewise.ai/threats/cve-2026-87369-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-2026-87369 · Severity: high · CVSS 7.5 · Published 2026-10-20

Oracle Service Bus is middleware that processes enterprise service integration and messaging. An unauthenticated attacker on the network can send specially crafted HTTP requests to cause the service to hang or crash repeatedly, resulting in a complete denial of service that disrupts business operations.

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

## Quick answers

**Is CVE-2026-87369 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-87369 being exploited in the wild.

**How severe is CVE-2026-87369?** High severity, with a CVSS score of 7.5, 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-2026-87369?** 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-2026-87369 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-87369?** 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

An easily exploitable denial of service vulnerability exists in the Core component of Oracle Service Bus that allows unauthenticated attackers with network access to send HTTP requests that trigger a hang or crash condition. No authentication, special configuration, or user interaction is required; the vulnerability is reachable directly over the network and can be reliably repeated to maintain service downtime.

## 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 remote code execution via HTTP](https://junglewise.ai/threats/cve-2026-87364-vulnerability-in-the-oracle-service-bus-product-of-oracle-fusion)
- [Oracle Service Bus authentication bypass or privilege escalation](https://junglewise.ai/threats/cve-2026-87359-vulnerability-in-the-oracle-service-bus-product-of-oracle-fusion)