Unauthorized Access Vulnerability in Helidon Webclient by Oracle
CVE-2026-101586

5.3MEDIUM

Key Information:

Vendor

Oracle
Status
Helidon
Vendor
CVE Published:
20 October 2026

What is CVE-2026-101586?

An authorization vulnerability in the Helidon Webclient component of Oracle Fusion Middleware allows unauthenticated users with network access via HTTP to exploit the system. A successful attack may result in unauthorized read access to sensitive data within Helidon, posing a significant risk to data confidentiality. Organizations utilizing the affected versions must apply protective measures to mitigate exposure and safeguard their data.

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

.