CVE-2026-101587CWE-400denial-of-service

CVE-2026-101587

Medium · published October 21, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
31.4
In the wild
Unconfirmed
What it is

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webclient-http1). 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 to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00385 · 31.4th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2026-10-21T02:18Z
References (1)
https://www.oracle.com/security-alerts/cpuoct2026.html · [email protected]
EPSS history
Timeline
  • 22 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 20 OCT 21:21Z
    Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webclient-http1)
    cvelistv5
  • 20 OCT 21:21Z
    Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webclient-http1)
    cvelistv5