Denial of Service Vulnerability in Helidon Web Server by Oracle
CVE-2026-87289

7.5HIGH

Key Information:

Vendor

Oracle
Status
Helidon
Vendor
CVE Published:
15 September 2026

What is CVE-2026-87289?

A vulnerability exists in the Helidon web server component of Oracle Fusion Middleware that allows an unauthenticated attacker with network access via HTTP to exploit the system. Successful exploitation can lead to unauthorized service disruptions, causing the Helidon server to hang or crash repeatedly. This poses significant availability challenges, emphasizing the need for swift action to address the issue and protect against potential downtime.

Affected Version(s)

Helidon 4.0.0 <= 4.5.4

References

https://www.oracle.com/security-alerts/cspusep2026.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

.