WebSocket Vulnerability in Oracle Fusion Middleware's Helidon Product
CVE-2026-101588

5.3MEDIUM

Key Information:

Vendor

Oracle
Status
Helidon
Vendor
CVE Published:
20 October 2026

What is CVE-2026-101588?

A vulnerability exists in Oracle Fusion Middleware's Helidon product related to WebSocket functionality, impacting versions ranging from 4.0.0 to 4.5.5 and 27.0.0. This issue can be easily exploited by an unauthenticated attacker who has network access via HTTP, potentially leading to unauthorized read access to specific data within Helidon. Organizations using affected versions should take immediate steps to mitigate this risk.

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:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.