Imperative Web Server Vulnerability in Oracle Fusion Middleware
CVE-2026-73905

9.8CRITICAL

Key Information:

Vendor

Oracle
Status
Helidon
Vendor
CVE Published:
18 August 2026

What is CVE-2026-73905?

A vulnerability exists within Oracle's Helidon component of Fusion Middleware, specifically affecting version 4.5.0 of the Imperative Web Server. This flaw can be exploited remotely by an unauthenticated attacker with network access through HTTP. Successful exploitation can lead to complete control over the Helidon instance, potentially compromising confidentiality, integrity, and availability. Organizations using this version should prioritize testing and mitigation strategies to secure their infrastructure.

Affected Version(s)

Helidon 4.0.0 <= 4.4.1

References

https://www.oracle.com/security-alerts/cspuaug2026.html
vendor-advisory

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.