DoS Vulnerability in Helidon Web Server by Oracle
CVE-2026-73935

7.5HIGH

Key Information:

Vendor

Oracle
Status
Helidon
Vendor
CVE Published:
18 August 2026

What is CVE-2026-73935?

This vulnerability in Oracle's Helidon, a component of Fusion Middleware's Imperative Web Server, allows an unauthenticated attacker with network access via HTTP/2 to exploit the system. When successfully executed, this flaw can lead to a denial of service, causing the Helidon application to hang or crash frequently, severely impacting availability. This security risk underscores the importance of securing applications against unauthorized HTTP/2 requests to maintain system stability.

Affected Version(s)

Helidon 4.5.1

References

https://www.oracle.com/security-alerts/cspuaug2026.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

.