CVE-2026-91346: Oracle Outside In Technology deserialization vulnerability in Clean Content SDK

CVE-2026-91346 · Severity: high · CVSS 8.2 · Published 2026-10-20

Oracle Outside In Technology is a content processing engine used by Oracle Fusion Middleware and third-party applications to safely handle document file formats. An unauthenticated remote attacker can exploit this vulnerability through a malicious document sent via HTTP to steal sensitive data or modify records, with minimal user interaction required. The vulnerability affects a widely-used component, potentially impacting multiple Oracle products and customer applications.

Technologies: Oracle Outside In Technology. Vendors: Oracle.

Quick answers

Is CVE-2026-91346 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-91346 being exploited in the wild.
How severe is CVE-2026-91346?
High severity, with a CVSS score of 8.2, published 20 October 2026.
Which products and versions are affected?
Oracle Outside In Technology 8.5.8.
Is there a fix for CVE-2026-91346?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-91346 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-91346?
Check whether you run Oracle Outside In Technology at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

This is an easily exploitable vulnerability in the Outside In Clean Content SDK (component of Oracle Outside In Technology) accessible over the network via HTTP. Exploitation requires user interaction (opening a document) but no authentication, and scope changes—meaning the impact extends beyond the vulnerable component to the broader system. Successful exploitation yields high-confidence confidentiality breach and limited integrity access.

Affected products

  • Oracle Outside In Technology 8.5.8

Timeline

  • 2026-10-20: disclosed

References

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