CVE-2025-36092: IBM Cloud Pak Business Automation DOS Vulnerability

CVE-2025-36092 is a denial of service vulnerability in IBM Cloud Pak for Business Automation caused by improper input validation. Authenticated users can exploit this flaw to disrupt service availability. This article covers technical details, affected versions, impact assessment, and mitigation strategies.

CVE-2025-36092 Overview

CVE-2025-36092 is a denial-of-service vulnerability affecting IBM Cloud Pak for Business Automation versions 25.0.0, 24.0.1, and 24.0.0. The flaw stems from improper validation of input length [CWE-1284], allowing an authenticated attacker on the network to disrupt service availability. IBM published an advisory addressing the issue, and the vulnerability received a CVSS 3.1 base score of 6.5.

Critical Impact
An authenticated remote attacker can trigger a denial of service against IBM Cloud Pak for Business Automation by sending input that bypasses length validation, impacting availability of automation workloads.

Affected Products

IBM Cloud Pak for Business Automation 24.0.0 (including interim fixes 001–004)
IBM Cloud Pak for Business Automation 24.0.1 (including interim fixes 001, 002, and 004)
IBM Cloud Pak for Business Automation 25.0.0 (including interim fix 001)

Discovery Timeline

2025-11-03 - CVE-2025-36092 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-36092

Vulnerability Analysis

The vulnerability resides in request-handling logic within IBM Cloud Pak for Business Automation. The affected component accepts user-supplied input without enforcing an upper bound on length. An authenticated attacker submits oversized input to trigger excessive resource consumption, resulting in a denial of service.

The flaw affects only availability. Confidentiality and integrity remain intact, as reflected in the CVSS vector. Exploitation requires valid credentials but no user interaction, and the attack originates over the network.

IBM Cloud Pak for Business Automation is deployed in enterprise environments for workflow automation, decision management, and content services. A successful attack can disrupt business processes dependent on these services until the affected component recovers or is restarted.

Root Cause

The root cause is improper restriction of input length as classified under [CWE-1284] (Improper Validation of Specified Quantity in Input). The application processes inputs without validating their size against enforced boundaries, allowing resource exhaustion.

Attack Vector

An authenticated user sends a crafted request containing input that exceeds expected size constraints to a vulnerable endpoint in Cloud Pak for Business Automation. The absence of proper length validation causes the backend to consume excessive memory or CPU, degrading or halting service.

No public proof-of-concept exploit is available, and the vulnerability is not listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. See the IBM Support advisory for component-specific details.

Detection Methods for CVE-2025-36092

Indicators of Compromise

Unexpected spikes in CPU or memory usage on Cloud Pak for Business Automation pods or nodes
Repeated HTTP requests from authenticated sessions containing abnormally large payloads
Service restarts, pod evictions, or OOMKilled events in the Cloud Pak namespace
Degraded response times or timeouts reported by automation workflow consumers

Detection Strategies

Monitor application and web server logs for requests with payload sizes exceeding normal operational baselines
Correlate authentication events with subsequent high-resource API calls from the same user session
Enable Kubernetes event auditing to capture pod lifecycle anomalies affecting Cloud Pak components
Track HTTP 5xx error rates against Cloud Pak for Business Automation endpoints

Monitoring Recommendations

Configure alerts on request body size thresholds at the ingress or API gateway layer
Baseline normal authenticated user request patterns and alert on statistical outliers
Forward Cloud Pak application, container, and ingress logs to a centralized SIEM for correlation
Review IBM AppSec advisories periodically for additional affected components or interim fixes

How to Mitigate CVE-2025-36092

Immediate Actions Required

Apply the fix referenced in the IBM Support advisory for the installed Cloud Pak for Business Automation version
Restrict access to the Cloud Pak management and API endpoints to trusted networks and users
Audit active user accounts and remove unnecessary privileges that could enable authenticated exploitation
Enable request size limits at reverse proxies or ingress controllers fronting Cloud Pak services

Patch Information

IBM has published guidance and remediation details on the IBM Support page. Administrators should upgrade affected deployments to the fixed interim fix level identified by IBM for versions 24.0.0, 24.0.1, and 25.0.0.

Workarounds

Enforce payload size limits at the ingress controller or API gateway to reject oversized requests
Apply rate limiting to authenticated API endpoints to reduce denial-of-service exposure
Configure Kubernetes resource quotas and limits to contain the impact of resource exhaustion
Monitor and auto-restart affected pods using liveness probes tuned to detect degraded states

bash

# Example NGINX ingress annotation to limit request body size
nginx.ingress.kubernetes.io/proxy-body-size: "1m"
nginx.ingress.kubernetes.io/limit-rps: "10"
nginx.ingress.kubernetes.io/limit-connections: "20"