High severity · published Sep 15, 2026
CVE-2026-87289
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webserver-static-content)
7.5
CVSS
0.5%
EPSS
No
On KEV
Description
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webserver-static-content). Supported versions that are affected are 4.0.0-4.5.4. 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 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).
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% 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 4.5.4 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-87289
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-87289
Vendor Advisory
https://www.oracle.com/security-alerts/cspusep2026.html
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