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IBM Cloud Pak for Business Automation CVE-2026-12759

| EUVDEUVD-2026-78156 MEDIUM
Uncontrolled Resource Consumption (CWE-400)
2026-09-14 psirt@us.ibm.com GHSA-r8hw-r6hm-q7g2
6.5
CVSS 3.1 · Vendor: us
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Attack ChainAIDerived

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

  1. Access
    Obtain low-privilege credentials
  2. Delivery
    Authenticate to Cloud Pak platform
  3. Exploit
    Submit resource-exhausting request or input
  4. Execution
    Trigger unthrottled resource allocation
  5. Persist
    Exhaust CPU/memory
  6. Impact
    Deny service to legitimate users

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V2 - Validation and Business Logic Resource consumption limits
MITRE ATT&CK

1 technique across 1 tactic: Impact

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

Exploitation Conditions

Exploitation requires a valid authenticated session with at least low-privilege access to the IBM Cloud Pak for Business Automation platform (PR:L). The platform must be running one of the affected version/interim-fix combinations across the 24.0.0, 24.0.1, 25.0.0, or 26.0.0 release lines. Exploitation is limited by the authentication barrier - unauthenticated external actors cannot trigger this condition. The specific internal feature, API endpoint, or input path triggering the uncontrolled resource consumption is not disclosed in available public data.

Impact

The NVD-supplied CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N) contains a significant internal contradiction: it scores C:H (high confidentiality impact) but the description explicitly states denial of service due to uncontrolled resource consumption, and the assigned CWE is CWE-400. The 'Denial Of Service' tag and CWE-400 both confirm this is an availability-impacting bug, not a confidentiality one. The C:H metric appears to be a data entry error; the correct impact metric should be A:H with C:N. Applying the corrected interpretation yields a score consistent with a 6.5 medium (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). Real-world risk is moderate: exploitation requires valid credentials, the product is enterprise-deployed behind authentication controls, and no public exploit or active exploitation is identified. The primary concern is availability impact to business-critical automation workflows.

Exploit ScenarioDerived

An authenticated internal user or compromised account with low-privilege access sends specially crafted or high-volume requests to a resource-intensive endpoint within the automation platform, causing the service to allocate CPU or memory without bound. This exhausts available system resources and renders the Cloud Pak for Business Automation services unavailable to other users. No public exploit code exists at time of analysis.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 15, 2026

Uncontrolled resource consumption in IBM Cloud Pak for Business Automation enables authenticated network users to exhaust service resources and trigger a denial of service condition. Affected versions span the 24.0.0, 24.0.1, 25.0.0, and 26.0.0 release lines, each capped at specific interim fix levels. No public exploit code has been identified at time of analysis, and the vulnerability is not listed in CISA KEV.

RemediationAI

Apply the relevant IBM-supplied interim fix that exceeds the listed upper bound for each release train: for 24.0.0, apply a fix beyond Interim Fix 009; for 24.0.1, apply a fix beyond Interim Fix 008; for 25.0.0, apply a fix beyond Interim Fix 005; and for 26.0.0, apply a fix beyond Interim Fix 001. Consult the IBM advisory at https://www.ibm.com/support/pages/node/7285931 for exact fix designations. As a compensating control prior to patching, restrict authenticated access to the platform to the minimum necessary set of users, and implement network-layer rate limiting or connection throttling on ingress to the Cloud Pak services to limit resource exhaustion impact.

Affected VersionsENISA

Cloud Pak for Business Automation 24.0.1 ≤24.0.1 Interim Fix 008
Cloud Pak for Business Automation 25.0.0 ≤25.0.0 Interim Fix 005
Cloud Pak for Business Automation 26.0.0 ≤26.0.0 Interim Fix 001
Cloud Pak for Business Automation 24.0.0 ≤24.0.0 Interim Fix 009

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

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

Technical ContextAI · show details

IBM Cloud Pak for Business Automation is an enterprise automation platform built on Red Hat OpenShift, incorporating capabilities for document processing, workflow automation, and decision management. CWE-400 (Uncontrolled Resource Consumption) describes a class of bugs where an authenticated actor can submit requests or inputs that cause the system to allocate disproportionate CPU, memory, thread, or connection resources without appropriate throttling or quota enforcement. The absence of rate limiting or resource caps on a privileged code path allows a low-privileged authenticated user to saturate the service.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (us) PRIMARY 6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
vuln.today AI 6.5 MEDIUM

DoS via CWE-400 with PR:L authenticated network access; no confidentiality or integrity impact applies.

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

Primary rating from Vendor (us).

CVSS VectorVendor: us

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

DescriptionCVE.org

IBM Cloud Pak for Business Automation could allow an authenticated user to cause a denial of service due to uncontrolled resource consumption.

Threat Intelligence Overview

EPSS Score
0.4%
Top 69% exploitable
Prevalence
Medium
enterprise automation suite, common in large IBM-stack organizations
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 MEDIUM
CISA KEV No
Public POC No
EPSS 0.4%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
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· derived
Medium

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +32
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

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