---
id: "CVE-2026-91405"
kind: "vulnerability"
aliases: ["CVE-2026-91405"]
title: "Oracle Outside In PDF Export SDK: unauthenticated takeover over HTTP"
severity: "high"
cvss: 7.5
epss: 0.00281
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["fusion-middleware", "oracle", "outside-in", "package", "self-hosted"]
not_affected_if: ["no-outside-in-sdk"]
published_at: "2026-10-20T22:20:43+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-2026-91405", "first_seen_at": "2026-10-23T21:57:26+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-91405", "first_seen_at": "2026-10-25T12:38:52+00:00"}]
---

# Oracle Outside In PDF Export SDK: unauthenticated takeover over HTTP

The Oracle Outside In PDF Export SDK, part of Oracle Fusion Middleware, has a flaw that a remote unauthenticated attacker can reach over HTTP. A successful attack, which needs a user to take an action, can take over the component and affect its confidentiality, integrity and availability.

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

## How to check

- Check whether the Outside In PDF Export SDK is deployed, for example in Oracle Fusion Middleware installs, and note its version
- Confirm the installed version against the affected release `8.5.8` listed by the source

## Fix

- Apply the vendor patch from Oracle's Security Alert for CVE-2026-91405 (fixed version unknown from sources)
- Restrict HTTP access to services that load the SDK until patched

## Timeline

- 2026-10-23T21:57:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-91405
- 2026-10-25T12:38:52+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-91405

## From the sources

Vulnerability in the Oracle Outside In Technology product of Oracle Fusion Middleware (component: Outside In PDF Export SDK).   The supported version that is affected is 8.5.8. Difficult to exploit 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 takeover of Oracle Outside In Technology. CVSS 3.1 Base Score 7.5 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/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_