Medium severity · published Aug 18, 2026
CVE-2026-73909
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server)
5.9
CVSS
0.3%
EPSS
No
On KEV
Description
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 3.0.0-3.2.18. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Helidon accessible data. CVSS 3.1 Base Score 5.9 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N).
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HE
Helidon · Oracle Corporation
3.0.0 through 3.2.18 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-73909
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-73909
Vendor Advisory
https://www.oracle.com/security-alerts/cspuaug2026.html
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