---
id: "CVE-2026-91355"
kind: "vulnerability"
aliases: ["CVE-2026-91355"]
title: "Oracle Outside In: local flaw lets a logged-on user take over the SDK"
severity: "high"
cvss: 8.4
epss: 0.00164
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["fusion-middleware", "on-prem", "oracle", "outside-in", "vendor"]
not_affected_if: ["sdk-not-installed"]
published_at: "2026-10-20T22:20:38+00:00"
first_seen_at: "2026-10-23T21:57:26+00:00"
updated_at: "2026-10-25T12:38:52+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91355", "first_seen_at": "2026-10-23T21:57:26+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-91355", "first_seen_at": "2026-10-25T12:38:52+00:00"}]
---

# Oracle Outside In: local flaw lets a logged-on user take over the SDK

Oracle Outside In Technology, part of Oracle Fusion Middleware, has a flaw in its Clean Content SDK that affects version 8.5.8. A local attacker with a logon to the machine where it runs can compromise the product and take it over.

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

## How to check

- Check the installed Outside In Clean Content SDK version against the affected version `8.5.8` in your Oracle Fusion Middleware inventory
- unknown

## Fix

- Apply the Oracle Critical Patch Update fix for Outside In Technology; the fixed version is unknown from the sources
- unknown

## Timeline

- 2026-10-23T21:57:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-91355
- 2026-10-25T12:38:52+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-91355

## 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 unauthenticated 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 takeover of Oracle Outside In Technology. CVSS 3.1 Base Score 8.4 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

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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_