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CriticalVulnerabilityCVE-2026-91341updated 25 Oct 2026, 18:50 UTC

Oracle Outside In Clean Content SDK flaw lets remote attackers modify data or crash service

A bug in Oracle's Outside In document-processing software lets anyone on the network, with no login, alter or delete data and crash the service. Attackers can reach it simply by sending it crafted web requests.

Official, 2 sources
SeverityCriticalCVSS 9.1 of 10
Being exploited?UnclearNo reports either way yet
Fix available?UnclearNo fixed version published in the sources yet
How sure is this?Official, 2 sourcesBacked by an official source

How the attack works simplified

  1. 1Unauthenticated attackerNeeds only network access, no login
  2. 2Crafted HTTP requestSent to the exposed service over HTTP
  3. 3Outside In SDK processes inputFlaw in version 8.5.8 is triggered
  4. 4Data modified or deletedIntegrity impact on accessible data
  5. 5Service hangs or crashesRepeatable denial of service
  6. ResultData altered and service repeatedly crashes

What happened

Oracle Outside In Technology (Fusion Middleware), component Outside In Clean Content SDK, version 8.5.8, contains an easily exploitable flaw reachable over HTTP without authentication, allowing data integrity impact and denial of service (CVSS 3.1 9.1).

Why it is dangerous: An unauthenticated attacker can create, delete or change critical data the product can access, or repeatedly crash or hang it. Organizations running this SDK to clean or process uploaded documents are at risk.

Are you affected?

You are affected if you run Oracle Outside In Technology Clean Content SDK version 8.5.8 in a network-reachable HTTP-facing service.

Oracle Outside In Technology (Oracle Fusion Middleware), Outside In Clean Content SDK, version 8.5.8

What to do

  1. Check whether Oracle Outside In Clean Content SDK 8.5.8 is installed in any internet- or network-facing service
  2. Restrict network access to the affected service to trusted sources until a fix is applied
  3. Apply the vendor's security update from Oracle's Critical Patch Update or security advisory as soon as it is available
  4. Monitor logs for unusual HTTP requests or repeated service crashes

Timeline

  1. 20 Oct 2026, 22:20 UTC
    Publicly disclosed
  2. 20 Oct 2026, 22:20 UTC
    Reported by NVD · NVD
  3. 25 Oct 2026, 18:50 UTC
    GitHub Advisory reported on it · GitHub Advisory

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-91341 · GHSA-32g2-qh8h-qcv2
CVSS
9.1 / 10
EPSS
0.4% chance of exploitation within 30 days
Disclosed
20 Oct 2026, 22:20 UTC
On Zero Radar
before the radar started
Last change
25 Oct 2026, 18:50 UTC

The plain-language parts and the attack diagram were written by an AI model (anthropic/claude-haiku-5.5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

Oracle Outside In Clean Content SDK flaw lets remote attackers modify data or crash service · Zero Radar