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Oracle Outside In EUVDEUVD-2026-106438

| CVE-2026-87397 HIGH
Improper Access Control (CWE-284)
2026-10-20 secalert_us@oracle.com GHSA-g2r7-cmh5-vg39
8.8
CVSS 3.1 · Vendor: oracle
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Deliver crafted document via HTTP
  2. Delivery
    User or service opens file in Outside In
  3. Exploit
    Trigger parser memory corruption
  4. Execution
    Execute attacker-controlled code
  5. Impact
    Take over Outside In component

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Access control enforcement
MITRE ATT&CK

1 technique across 1 tactic: Defense Evasion

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires that an application using Oracle Outside In Technology 8.5.8 (Outside In Core) parse an attacker-supplied, specially crafted document - the attacker delivers the file over HTTP (AV:N) and no authentication is needed (PR:N), but a person or automated process other than the attacker must open/process that file (UI:R), which is the key limiting factor. No special non-default configuration is called out in the description; the practical exposure is bounded by whether the deploying product feeds untrusted documents into Outside In and whether a human/pipeline triggers the parse. Only version 8.5.8 is stated as affected.

Impact

This is a credible high-priority issue, though not a drop-everything emergency absent exploitation evidence. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, base 8.8) describes a low-complexity, network-reachable, unauthenticated flaw yielding full compromise (takeover) of Oracle Outside In Technology, consistent with a document-parsing memory-corruption bug in a file-conversion library. The single meaningful limiter is UI:R - a human (or an automated pipeline acting on attacker-supplied content) must process the malicious file; this is why it is 8.8 rather than a 9.8 fully-automatable RCE. No EPSS score, KEV listing, or POC indicator was provided in the input, so exploitation likelihood cannot be quantified: no public exploit identified at time of analysis, and there is no evidence of active exploitation. Note a metadata conflict worth flagging to the vendor/triage: the input Tag 'Information Disclosure' understates a vulnerability that NVD/Oracle rate as C:H/I:H/A:H full takeover - treat this as a code-execution/takeover issue, not merely disclosure. Because Outside In is an embedded SDK, real exposure depends heavily on which downstream products bundle it and whether they expose it to untrusted documents.

Exploit ScenarioDerived

An attacker crafts a malicious document (e.g., a specially-formed office/graphics/archive file) and delivers it over HTTP to a service that uses Oracle Outside In Technology for content extraction, preview, or conversion. When a user or an automated processing pipeline parses the file, a flaw in the Outside In Core parser is triggered, leading to full compromise of the Outside In component. No public exploit code is identified in the provided data, and exploitation requires that the victim actually process the attacker's file (UI:R).

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 21, 2026

Crafted-document processing in Oracle Outside In Technology 8.5.8 (Outside In Core) can be exploited by an unauthenticated network attacker to take over the affected application, with high confidentiality, integrity, and availability impact. The attacker delivers a malicious file over HTTP and succeeds only if a person or automated pipeline opens it (UI:R), so real-world exposure is bounded by whether the deploying product ingests untrusted documents through Outside In. No CISA KEV listing appears in the supplied intelligence and no public exploit was identified at time of analysis; the 8.8 score reflects potential impact rather than demonstrated exploitation.

RemediationAI

Apply the Outside In Technology fix published in Oracle's October 2026 Critical Patch Update at https://www.oracle.com/security-alerts/cpuoct2026.html; that advisory is the authoritative source, and since the exact patched build number is not enumerated in the supplied data, confirm the fixed Outside In Core version with Oracle Support before closing the finding. Where patching must wait, reduce exposure at the ingestion boundary: run Outside In parsing inside a disposable, low-privilege container with no outbound network access and a read-only filesystem (adds conversion latency and operational overhead), reject or quarantine documents from untrusted sources before they reach the parser, and disable document-format filters the application does not need (reduces format coverage for users). Because exploitation requires the crafted file to be opened, attachment sandboxing, file-type validation, and content disarm and reconstruction on inbound documents meaningfully lower risk, though CDR can alter the fidelity of legitimate complex files.

Affected VersionsENISA

Oracle Outside In Technology 8.5.8

Affected Packages

euvd oracle_outside_in_technology no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Oracle Outside In Technology is a family of document-filtering SDKs (Outside In Core plus viewer, export, and search components) licensed inside enterprise software such as content management systems, email gateways, DLP and archiving platforms, and eDiscovery tools to render, convert, and extract text from hundreds of binary file formats. The defect sits in the Outside In Core parsing engine, which processes attacker-controlled file structures in memory on behalf of the host application; the CVSS vector AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H describes a remotely deliverable, low-complexity flaw that requires only that a victim or automated document consumer open the crafted file, after which the attacker gains high impact across all three security objectives within the same scope. No CWE was assigned in the supplied data, but the profile - a malformed document triggering memory-safety failure in a native file-format parser - matches the classic input-validation and memory-corruption weakness class. ENISA EUVD-2026-106438 corroborates 8.5.8 as the affected version, and no CPE identifiers were supplied, so version mapping must be done through downstream vendors.

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Severity by source

Vendor (oracle) PRIMARY 8.8 HIGH
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vuln.today AI 8.8 HIGH

Malicious file is delivered over HTTP (AV:N) and needs no auth (PR:N) but must be opened by a victim (UI:R); a parser takeover yields full C/I/A impact within the component (S:U).

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

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 takeover of Oracle Outside In Technology. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

Executive ViewAI

Why It Matters

Oracle Outside In Technology 8.5.8, the document-parsing engine embedded inside many enterprise capture, OCR, eDiscovery, DLP, email-gateway conversion and archival products, contains a flaw that lets a crafted file seize control of the host application once that file is opened. Practical exposure is therefore concentrated in business processes that automatically ingest and convert documents received from outside parties rather than in the general user population, and it is bounded by how widely the library is embedded across the estate. With no vendor patch and no public exploit code identified, this is an unmitigated but conditional exposure that warrants containment and supplier pressure rather than emergency outage actions.

Business Impact: High
Compensating Controls

No vendor patch identified at time of analysis. Interim mitigations: restrict or disable automatic ingestion and conversion of untrusted documents; enforce file-type allow-listing and block macro/embedded-object content; detonate inbound files in a sandbox before they reach Outside In; run parsing services in isolated, low-privilege containers or network segments with no outbound access; apply EDR and monitor parsing hosts for anomalous process, file and network behaviour; and prioritise migration to any vendor build confirmed to ship a fixed Outside In version.

Threat Intelligence Overview

EPSS Score
0.4%
Top 68% exploitable
Prevalence
Medium
document-parsing SDK embedded in various enterprise content/security products, not standalone-ubiquitous
Data Quality
4 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.4%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact
High

Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +44
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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