Medium severity · published Oct 20, 2026
CVE-2026-101586
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webclient)
5.3
CVSS
0.2%
EPSS
No
On KEV
Description
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webclient). 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 read access to a subset of Helidon accessible data. CVSS 3.1 Base Score 5.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HE
Helidon · Oracle Corporation
4.0.0 through 4.5.5; 27.0.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-101586
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-101586
www.oracle.com
https://www.oracle.com/security-alerts/cpuoct2026.html
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