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Oracle SOA Suite CVE-2026-91236

| EUVDEUVD-2026-106491 CRITICAL
Improper Authentication (CWE-287)
2026-10-20 secalert_us@oracle.com GHSA-36c9-4crg-8qwj
9.8
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
    Reach SOA Suite HTTP endpoint
  2. Delivery
    Send crafted request to Fabric Layer
  3. Exploit
    Trigger unauthenticated flaw
  4. Execution
    Execute code / gain control
  5. Impact
    Full takeover of SOA Suite

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Authentication mechanism validation
MITRE ATT&CK

2 techniques across 2 tactics: Defense Evasion, Initial Access

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

Exploitation Conditions

No special conditions - remote unauthenticated exploitation over HTTP against Oracle SOA Suite (Oracle Fusion Middleware, Fabric Layer component) in versions 12.2.1.4.0 and 14.1.2.0.0, consistent with AV:N/AC:L/PR:N/UI:N. The practical limiting factor is network reachability: the attacker must be able to reach the SOA Suite HTTP interface, so instances isolated behind segmentation, VPN, or not exposed to untrusted networks are substantially harder to exploit. Exploitation is confined to the two listed versions; other releases are not stated as affected in the available data.

Impact

This is a genuine high-priority vulnerability, not a high-CVSS-but-low-risk artifact. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N) describes the worst-case exploitation profile: network-reachable over HTTP, low attack complexity, no privileges, and no user interaction, with full confidentiality, integrity, and availability impact (C:H/I:H/A:H) culminating in complete takeover of Oracle SOA Suite. These signals are mutually consistent - the description's claim of 'easily exploitable' unauthenticated compromise aligns with AC:L/PR:N/UI:N, so there is no conflict between the vector and the narrative. The key caveat is that several real-world risk signals are simply absent from the input: there is no EPSS exploitation-probability score, the CVE is not listed in CISA KEV, and no public proof-of-concept is referenced (the sole reference is the Oracle October 2026 Critical Patch Update advisory). Therefore, active exploitation cannot be asserted - no public exploit identified at time of analysis. The absence of EPSS/KEV/POC data does not lower the intrinsic severity; it only means that, as of this analysis, exploitation is a credible near-term risk rather than a confirmed in-the-wild event. Given the pre-auth RCE-equivalent takeover profile on internet- or intranet-facing middleware, defenders should treat this as urgent and patch via the Oracle CPU.

Exploit ScenarioDerived

An unauthenticated attacker with network access sends a crafted HTTP request to the exposed Fabric Layer component of an Oracle SOA Suite instance (12.2.1.4.0 or 14.1.2.0.0), exploiting the flaw without credentials or user interaction. Because attack complexity is low, a single reliable request can lead to full compromise and takeover of the SOA Suite environment. No public exploit code was identified in the provided data, so this scenario is inferred from the CVSS vector rather than an observed PoC.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
No patch listed yet 0.5% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 20, 2026

Remote unauthenticated attackers can achieve takeover of Oracle SOA Suite 12.2.1.4.0 and 14.1.2.0.0 through the Fabric Layer over HTTP, with the 9.8 CVSS reflecting high confidentiality, integrity, and availability impact and no privileges or user interaction required. No public exploit identified at time of analysis and no CISA KEV confirmation is present in the supplied data, but internet-reachable SOA Suite instances should be treated as high priority because the assessed vector is pre-authentication network exploitation.

RemediationAI

Apply the Oracle Critical Patch Update fixes referenced in the October 2026 advisory at https://www.oracle.com/security-alerts/cpuoct2026.html; the supplied data does not specify an exact patched build number, so confirm the fixed release for your supported branch with Oracle before upgrading. Until patched, reduce exposure by restricting network access to the SOA Suite Fabric Layer HTTP interface through firewall allowlists, segmentation, or VPN-only access, with trade-offs including disrupted partner integrations and remote administrative access. Place an application-aware reverse proxy or WAF in front of the HTTP endpoint for virtual patching and request inspection, recognizing that it may not fully cover all Fabric Layer traffic and can add latency or break legitimate SOAP traffic. Monitor pre-authentication requests to SOA Suite endpoints for anomalous access, but do not treat detection alone as a substitute for patching.

Affected VersionsENISA

Oracle SOA Suite 12.2.1.4.0
Oracle SOA Suite 14.1.2.0.0

Affected Packages

euvd oracle_soa_suite 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 SOA Suite is part of Oracle Fusion Middleware, and the affected component is the Fabric Layer, which participates in SOA service infrastructure and communication. The supplied data assigns no CWE, so the precise root cause, such as deserialization, authentication bypass, or request handling, cannot be confirmed and should not be assumed. The authoritative CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, meaning network access over HTTP, low attack complexity, no privileges, no user interaction, unchanged scope, and high impact across confidentiality, integrity, and availability; exploitation is limited to versions 12.2.1.4.0 and 14.1.2.0.0 in the available data. The practical precondition is reachability of the SOA Suite HTTP interface, so segmented, VPN-only, or otherwise non-internet-exposed deployments are materially less exposed.

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Severity by source

Vendor (oracle) PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 9.8 CRITICAL

Description confirms unauthenticated network HTTP attack with no user interaction and resulting full takeover, so AV:N/AC:L/PR:N/UI:N and C:H/I:H/A:H.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/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
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

Vulnerability in the Oracle SOA Suite product of Oracle Fusion Middleware (component: Fabric Layer). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle SOA Suite. Successful attacks of this vulnerability can result in takeover of Oracle SOA Suite. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Executive ViewAI

Why It Matters

Oracle SOA Suite 12.2.1.4.0 and 14.1.2.0.0 face a critical-severity remote takeover risk through the Fabric Layer over HTTP, with no vendor-released patch identified at time of analysis. Because SOA Suite commonly orchestrates core integration and business-process traffic, a successful compromise could expose sensitive data, disrupt critical services, and undermine trust in shared middleware. No public exploit identified at time of analysis, but internet-reachable instances warrant high priority for containment and monitoring while Oracle remediation is pursued.

Business Impact: Severe
Compensating Controls

No vendor-released patch identified at time of analysis; interim controls include restricting Fabric Layer HTTP access to trusted networks, segmenting internet-reachable SOA Suite instances, deploying WAF/IPS virtual patching, disabling unnecessary endpoints, enforcing least-privilege network access, and monitoring for anomalous activity.

Threat Intelligence Overview

EPSS Score
0.5%
Top 59% exploitable
Prevalence
Medium
Enterprise Oracle Fusion Middleware integration product; common in large Oracle shops, not universal
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 CRITICAL
CISA KEV No
Public POC No
EPSS 0.5%
Patch available No
Active threat No
Deciding rule
CRITICAL severity
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
Yes
Human Impact
Very High

Priority Score

49
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +49
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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