---
id: "CVE-2026-91475"
kind: "vulnerability"
aliases: ["CVE-2026-91475"]
title: "Oracle Outside In Clean Content SDK: local low-privilege user can modify data"
severity: "medium"
cvss: 6.6
epss: 0.00125
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["fusion-middleware", "oracle", "outside-in", "package", "self-hosted"]
not_affected_if: ["no-outside-in-installed", "no-untrusted-local-logons"]
published_at: "2026-10-20T22:20:51+00:00"
first_seen_at: "2026-10-23T21:57:27+00:00"
updated_at: "2026-10-25T12:38:51+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91475", "first_seen_at": "2026-10-23T21:57:27+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-91475", "first_seen_at": "2026-10-25T12:38:51+00:00"}]
---

# Oracle Outside In Clean Content SDK: local low-privilege user can modify data

Oracle Outside In Technology's Clean Content SDK component, version 8.5.8, has a flaw that lets a logged-in low-privilege user on the host compromise the product. A successful attack can create, delete or modify critical data and read a subset of data, and can partly deny service.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Confirm whether `Oracle Outside In` 8.5.8 is installed (the Clean Content SDK component of Oracle Fusion Middleware)
- Check the vendor's advisory for the exact affected versions: unknown

## Fix

- Apply the Oracle Critical Patch Update that covers CVE-2026-91475 for Oracle Outside In: unknown version
- Restrict local logons on hosts running Oracle Outside In until patched

## Timeline

- 2026-10-23T21:57:27+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-91475
- 2026-10-25T12:38:51+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-91475

## From the sources

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 logon to the infrastructure where Oracle Outside In Technology executes to compromise Oracle Outside In Technology.  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 as well as  unauthorized read access to a subset of Oracle Outside In Technology accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Outside In Technology. CVSS 3.1 Base Score 6.6 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L).

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_