Oracle Outside In Technology: Input validation flaw in Clean Content SDK
Summary
Oracle Outside In Technology version 8.5.8, specifically the Clean Content SDK component, contains an input validation flaw (CWE-20). An unauthenticated remote attacker with network access via HTTP can compromise the SDK, but exploitation requires a user to interact with crafted content. Per the CVSS vector, a successful attack can lead to high confidentiality impact and low integrity impact, and it may affect other products in the scope of the component.
Affected
- Oracle Outside In Technology 8.5.8 (Clean Content SDK component)
Fixed in
- Apply the Oracle patch from the October 2026 Critical Patch Update for Outside In Technology 8.5.8.
- Patched version number: Unknown. Check the Oracle advisory or My Oracle Support.
Workaround
- No workaround is listed in the CVE record.
- Restrict HTTP access to the Clean Content SDK component through firewalls or network segmentation (general recommendation, not vendor guidance).
Exploitation
- Not known to be exploited at time of publication.
- Not listed in the CISA KEV catalog (as checked by a third party on 21 October 2026).
- No public proof-of-concept found. EPSS below 1%.
- CISA SSVC: exploitation none, automatable no, technical impact partial.
Our recommendation
- Check whether Outside In Technology 8.5.8 is used, for example in Oracle Fusion Middleware or in custom or vendor software.
- Ask software vendors and developers whether the SDK is embedded.
- If an internet-facing service uses the SDK, patch with high priority; otherwise, schedule the patch with the October 2026 CPU.
- Until patched, limit HTTP exposure of the component and monitor for unusual activity.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Oracle Security Alerts - October 2026 CPU www.oracle.com
- NVD/OpenCVE record CVE-2026-91346 app.opencve.io
- Vulners CVE-2026-91346 vulners.com
- Vulners Oracle CPU October 2026 vulners.com
- Brandefense: Oracle October 2026 CPU brandefense.io
- Waratek: Oracle October 2026 CPU waratek.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 15:25.
Original description (NVD)
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 unauthenticated attacker with network access via HTTP to compromise Oracle Outside In Technology. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Oracle Outside In Technology, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Outside In Technology accessible data as well as unauthorized update, insert or delete access to some of Oracle Outside In Technology accessible data. CVSS 3.1 Base Score 8.2 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N).
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
Affected? We can help.
We check whether your systems are affected, install updates and close the gap – continuously with the System Health Checker if you wish.