Denial of Service Vulnerability in Oracle Fusion Middleware's Helidon Product
CVE-2026-101572

7.5HIGH

Key Information:

Vendor

Oracle
Status
Helidon
Vendor
CVE Published:
20 October 2026

What is CVE-2026-101572?

A vulnerability exists in Oracle Fusion Middleware's Helidon product, specifically in the helidon-webclient-http2 component. Supported versions 4.0.0 through 4.5.5 and 27.0.0 are affected. This vulnerability allows an unauthenticated attacker with network access via HTTP/2 to potentially disrupt the service by causing the Helidon application to hang or crash frequently, leading to a denial of service scenario. Organizations using the affected versions should prioritize applying security updates to mitigate the risks associated with this vulnerability.

Affected Version(s)

Helidon 4.0.0 <= 4.5.5

Helidon 27.0.0

References

https://www.oracle.com/security-alerts/cpuoct2026.html
vendor-advisory

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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