Oracle Outside In Technology: Remote code execution via HTTP
Summary
Oracle Outside In Technology version 8.5.8, specifically the Outside In Clean Content SDK component of Oracle Fusion Middleware, contains a critical flaw. An attacker with network access via HTTP and a low-privileged account can compromise the component, with a possible takeover, and because the scope changes, other products may also be significantly affected. The CVSS base score is 9.9. Exposure depends on whether an application embeds the SDK and publishes its HTTP endpoints, and NVD analysis was still pending at the time of writing.
Affected
- Oracle Outside In Technology, Outside In Clean Content SDK component, version 8.5.8
- Only 8.5.8 is listed in the CVE record and NVD CPE data.
Fixed in
- Unknown. Oracle's October 2026 Critical Patch Update (CPU) contains the fix. Confirm the fixed version for your release on the live Oracle advisory.
Workaround
- None documented in the CVE record.
- General hardening only, not confirmed by Oracle for this CVE: restrict external HTTP access to the component with firewall rules or ACLs.
Exploitation
- No exploitation in the wild known.
- CISA SSVC: exploitation none, automatable no.
- Not listed in CISA KEV per OpenCVE (check date unclear).
- No public proof of concept found in research.
Our recommendation
- Ask your application vendor or administrator whether Outside In Clean Content SDK 8.5.8 is present, including in Oracle products and custom software.
- If present, apply the October 2026 CPU for the affected release after confirming the fixed version on the Oracle advisory.
- Until patched, block external HTTP access to the component and limit internal access to required hosts.
- Check NVD for the final CWE and CVSS, and monitor KEV status.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Oracle Security Alert: October 2026 CPU www.oracle.com
- OpenCVE: CVE-2026-91354 app.opencve.io
- Vulners: CVE-2026-91354 vulners.com
- Breach Signal: Oracle October 2026 CPU breach-signal.com
- Strix: CVE-2026-91354 www.strix.ai
- Oracle Security Alerts index www.oracle.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 30 Oct 2026, 15:04.
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 low privileged attacker with network access via HTTP to compromise Oracle Outside In Technology. 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 takeover of Oracle Outside In Technology. CVSS 3.1 Base Score 9.9 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H).
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.
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