---
id: "CVE-2026-87396"
kind: "vulnerability"
aliases: ["CVE-2026-87396"]
title: "Oracle Outside In: unauthenticated HTTP flaw exposes critical data to attackers"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["document-parsing", "fusion-middleware", "oracle", "outside-in", "package"]
not_affected_if: ["version-not-8.5.8"]
published_at: "2026-10-20T22:20:17+00:00"
first_seen_at: "2026-10-23T21:57:25+00:00"
updated_at: "2026-10-25T03:51:10+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-87396", "first_seen_at": "2026-10-23T21:57:25+00:00"}]
---

# Oracle Outside In: unauthenticated HTTP flaw exposes critical data to attackers

Oracle Outside In Core version 8.5.8 has a flaw that lets an unauthenticated attacker over HTTP access data the product can reach. Exploitation needs a person other than the attacker to take an action, and the CVSS score is 6.5 with confidentiality impact only.

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

## How to check

- Check whether Oracle Outside In Technology is installed and which version it reports, looking for `8.5.8` in the product's version output or installer records.
- Check whether any HTTP-facing application bundles Outside In Core, since the sources do not name a specific product.

## Timeline

- 2026-10-23T21:57:25+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-87396

## From the sources

Vulnerability in the Oracle Outside In Technology product of Oracle Fusion Middleware (component: Outside In Core).   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.  Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in  unauthorized access to critical data or complete access to all Oracle Outside In Technology accessible data. CVSS 3.1 Base Score 6.5 (Confidentiality impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N).

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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_