High severity · published Oct 20, 2026
CVE-2026-91340
Vulnerability in the Oracle Outside In Technology product of Oracle Fusion Middleware (component: Outside In Clean Content SDK)
8.8
CVSS
0.4%
EPSS
No
On KEV
Description
Vulnerability in the Oracle Outside In Technology product of Oracle Fusion Middleware (component: Outside In Clean Content SDK). The supported version that is affected is 8.5.8. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Outside In Technology. Successful attacks of this vulnerability can result in takeover of Oracle Outside In Technology. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OO
Oracle Outside In Technology · Oracle Corporation
8.5.8 · source: vendor
Affected product
OO
Oracle Outside In Technology
Oracle Corporation
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-91340
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-91340
www.oracle.com
https://www.oracle.com/security-alerts/cpuoct2026.html
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