HTTP/2 Vulnerability in Oracle Helidon Web Server
CVE-2026-83280

7.5HIGH

Key Information:

Vendor

Oracle
Status
Helidon
Vendor
CVE Published:
15 September 2026

What is CVE-2026-83280?

A vulnerability exists in Oracle Helidon's web server component that could be exploited by an unauthenticated attacker with network access via HTTP/2. Successful exploitation may allow the attacker to cause a denial of service (DoS) on the application, resulting in a hang or frequently repeating crashes. The affected versions range from 4.0.0 to 4.5.4 of Helidon, making it imperative for users to implement recommended security measures to mitigate potential risks.

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

.