Unauthenticated Access Vulnerability in Oracle Helidon Web Client
CVE-2026-101584

6.5MEDIUM

Key Information:

Vendor

Oracle
Status
Helidon
Vendor
CVE Published:
20 October 2026

What is CVE-2026-101584?

An unauthenticated access vulnerability exists in Oracle's Helidon product, specifically within the helidon-webclient-websocket component. This flaw affects multiple versions, allowing an attacker with network access via HTTP to exploit the vulnerability without authentication. If successfully exploited, an attacker may gain unauthorized read access to certain data in Helidon and could cause a partial denial of service, impacting the availability of the application. Organizations using the affected versions should take immediate steps to mitigate the 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:
6.5
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

.