CVE-2026-101572
HighCVSS 7.5Summary
Vulnerability in Oracle Helidon (component helidon-webclient-http2) versions 4.0.0-4.5.5 and 27.0.0. Easily exploitable by an unauthenticated attacker with network access via HTTP/2, leading to a hang or frequently repeatable crash (complete DOS).
Risk Assessment
An attacker could cause complete denial of service of Helidon, disrupting application operations. CVSS score of 7.5 indicates high risk to availability.
Recommendation
Update Helidon to a version outside the 4.0.0-4.5.5 and 27.0.0 range. Implement rate limiting and monitoring to detect DOS attacks.
Other vulnerabilities in Oracle Helidon
See all- CVE-2026-101585High
Vulnerability in Oracle Helidon (component helidon-cors) versions 3.0.0-3.2.21. Easily exploitable by an unauthenticated attacker with network access via HTTP, leading to unauthorized modification and read access to data and impact on other products.
- CVE-2026-101583High
Vulnerability in Oracle Helidon (component helidon-common-mapper) versions 4.0.0-4.5.5 and 27.0.0. Difficult to exploit, allows an unauthenticated attacker with network access via HTTP to cause unauthorized modification of data, partial read access, and partial DOS.
- CVE-2026-101579High
Vulnerability in Oracle Helidon (component helidon-grpc-server) versions 3.0.0-3.2.21. Easily exploitable by an unauthenticated attacker with network access via HTTP/2, leading to unauthorized modification and read access to data and impact on other products.
Original NVD description (English source)
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webclient-http2). Supported versions that are affected are 4.0.0-4.5.5 and 27.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP/2 to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Helidon. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Vulnerability data from NVD (NIST) · CISA KEV · EPSS