Denial of Service Vulnerability in Helidon Web Client by Oracle
CVE-2026-101587

5.3MEDIUM

Key Information:

Vendor

Oracle
Status
Helidon
Vendor
CVE Published:
20 October 2026

What is CVE-2026-101587?

A vulnerability exists in Oracle's Helidon web client, affecting multiple versions, whereby an unauthenticated attacker can exploit network access via HTTP. Successful attacks can lead to a partial denial of service, potentially affecting the availability of the Helidon application. It is crucial for users to implement timely security updates 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:
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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