---
id: "CVE-2026-91351"
kind: "vulnerability"
aliases: ["CVE-2026-91351"]
title: "Oracle Outside In Clean Content SDK: low-privilege local flaw allows data modification"
severity: "medium"
cvss: 6.1
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["fusion-middleware", "java-servers", "oracle", "outside-in", "package"]
not_affected_if: ["no-local-logon", "sdk-not-installed"]
published_at: "2026-10-20T22:20:37+00:00"
first_seen_at: "2026-10-23T21:57:26+00:00"
updated_at: "2026-10-25T04:03:35+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91351", "first_seen_at": "2026-10-23T21:57:26+00:00"}]
---

# Oracle Outside In Clean Content SDK: low-privilege local flaw allows data modification

Oracle Outside In Clean Content SDK version 8.5.8 has a flaw that lets a low-privileged user who can log on to the host modify or delete data handled by the library, and cause a partial denial of service. The CVSS 3.1 score is 6.1 with local attack vector, low privileges, and high integrity impact.

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

## How to check

- Check whether the Outside In Clean Content SDK is installed and which version: unknown
- Confirm the installed version is `8.5.8` or earlier as listed in the NVD entry: unknown

## Fix

- Apply the Oracle Critical Patch Update that covers Outside In Clean Content SDK; the fixed version is unknown from the sources

## Timeline

- 2026-10-23T21:57:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-91351

## 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 and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Outside In Technology. CVSS 3.1 Base Score 6.1 (Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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_