Oracle Outside In Technology: Unauthorized data modification via HTTP in Clean Content SDK
Summary
Oracle Outside In Technology version 8.5.8, specifically the Outside In Clean Content SDK component within Oracle Fusion Middleware, is affected. An unauthenticated attacker with network access via HTTP can compromise the product and gain unauthorized creation, deletion or modification access to critical data. Because of a scope change, attacks may also significantly impact other products that use the component.
Affected
- Oracle Outside In Technology 8.5.8 (Outside In Clean Content SDK component, Oracle Fusion Middleware)
Fixed in
Unknown. No fixed build was confirmed in the sources reviewed. Check Oracle's October 2026 Critical Patch Update advisory.
Workaround
- No vendor-issued workaround found. Check Oracle's advisory.
- Interim, unverified: block external HTTP access to the Clean Content SDK endpoint with firewall rules or ACLs.
Exploitation
- Exploitation in the wild: no evidence found.
- Not listed in CISA KEV at the time of the sources reviewed.
- CISA SSVC: Exploitation none, Automatable yes, Technical Impact partial.
- Public proof of concept: none found.
Our recommendation
- Inventory all Outside In 8.5.8 installations and identify which applications embed them.
- Check whether any HTTP service using them is reachable from the internet or untrusted networks, and restrict access now if possible.
- Obtain the fixed build from Oracle's advisory (valid support contract required) and apply it together with the other Outside In fixes of the October 2026 CPU.
- Confirm the current advisory revision, as sources list different revisions.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Oracle Security Alerts: October 2026 Critical Patch Update www.oracle.com
- OpenCVE: CVE-2026-91343 app.opencve.io
- Vulners: CVE-2026-91343 vulners.com
- Strix: CVE-2026-91343 www.strix.ai
- Oracle Security Alerts www.oracle.com
- Waratek: Oracle October 2026 Critical Patch Update waratek.com
- Breach Signal: Oracle October 2026 Critical Patch Update breach-signal.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, 07:27.
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. 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 creation, deletion or modification access to critical data or all Oracle Outside In Technology accessible data. CVSS 3.1 Base Score 8.6 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/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.
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