CISA KEV 2026: Urgent Patching Required for IBM Langflow, N-able N-central, and Apache Tomcat

---
title: Potential IBM Langflow Code Injection Exploitation
id: 1a2b3c4d-5e6f-7g8h-9i0j-1k2l3m4n5o6p
status: experimental
description: Detects suspicious process execution patterns indicative of code injection in IBM Langflow environments. Look for the web service spawning shells or Python utilities.
references:
  - https://cisa.gov/kev
author: Security Arsenal
date: 2026/08/05
tags:
  - attack.initial_access
  - attack.t1190
logsource:
  category: process_creation
  product: linux
detection:
  selection:
    ParentImage|contains: 'langflow'
    Image|endswith:
      - '/bash'
      - '/sh'
      - '/python'
      - '/python3'
  condition: selection
falsepositives:
  - Legitimate administrative debugging by developers
level: high
---
title: N-able N-central Authentication Bypass Indicator
id: 2b3c4d5e-6f7g-8h9i-0j1k-2l3m4n5o6p7q
status: experimental
description: Detects suspicious file activity or access patterns associated with N-able N-central exploitation, focusing on unauthorized access to configuration or agent binaries.
references:
  - https://cisa.gov/kev
author: Security Arsenal
date: 2026/08/05
tags:
  - attack.initial_access
  - attack.t1078
logsource:
  category: file_access
  product: windows
detection:
  selection:
    TargetFilename|contains:
      - 'Program Files (x86)\N-able\'
    Image|endswith:
      - '\powershell.exe'
      - '\cmd.exe'
  filter:
    User|contains:
      - 'SYSTEM'
      - 'NETWORK SERVICE'
  condition: selection and not filter
falsepositives:
  - Authorized N-able administrative tasks
level: high
---
title: Apache Tomcat Cleartext Sensitive Data Access
id: 3c4d5e6f-7g8h-9i0j-1k2l3m4n5o6p7q
status: experimental
description: Detects potential access to Tomcat Manager or administrative interfaces over non-encrypted channels or suspicious requests for configuration files.
references:
  - https://cisa.gov/kev
author: Security Arsenal
date: 2026/08/05
tags:
  - attack.credential_access
  - attack.t1552.001
logsource:
  category: webserver
  product: apache
detection:
  selection:
    cs-method:
      - 'GET'
      - 'POST'
    c-uri|contains:
      - '/manager'
      - '/admin'
      - '/tomcat-docs'
    cs-protocol|contains:
      - 'http/' # Implies unencrypted if HTTPS enforcement is bypassed
  condition: selection
falsepositives:
  - Legitimate administrative access over HTTP (misconfigured environment)
level: medium

// Hunt for suspicious process spawns related to Langflow or N-able exploitation
DeviceProcessEvents
| where Timestamp > ago(7d)
| where (FolderPath contains "langflow" or InitiatingProcessFolderPath contains "N-able") and 
        (ProcessVersionInfoOriginalFileName in ("powershell.exe", "cmd.exe", "bash", "sh") or 
         ProcessCommandLine has_any("whoami", "hostname", "curl", "wget", "nc.exe"))
| project Timestamp, DeviceName, AccountName, ProcessCommandLine, InitiatingProcessFileName, FolderPath
| extend Description = "Suspicious process spawned by high-risk application"

-- Hunt for evidence of N-ble or Langflow exploitation via process lineage
SELECT Pid, Name, CommandLine, Exe, Username, Parent.Pid AS ParentPid, Parent.Name AS ParentName
FROM pslist()
WHERE ParentName =~ 'langflow' 
   OR ParentName =~ 'java' AND CommandLine =~ 'tomcat'
   OR Exe =~ 'N-able'

# Windows Remediation Check for N-able N-central (CVE-2026-18556)
# Check for the service and report version for patch verification
$serviceName = "N-Able N-central"
$service = Get-Service -Name $serviceName -ErrorAction SilentlyContinue

if ($service) {
    Write-Host "[+] N-able N-central Service Found: $($service.DisplayName)"
    Write-Host "[!] ACTION REQUIRED: Verify the build version matches the patched vendor advisory for CVE-2026-18556."
    Write-Host "[+] Restrict management interface access to known IP ranges immediately via firewall."
} else {
    Write-Host "[-] N-able N-central Service not found on this host."
}

# -------------------------------------------------

# Bash Remediation Check for Linux Components
# Save as .sh and execute
# -------------------------------------------------

# Check for IBM Langflow (CVE-2026-9198)
if pgrep -f "langflow" > /dev/null; then
    echo "[+] IBM Langflow process detected."
    echo "[!] ACTION REQUIRED: Update to latest patched version immediately to mitigate Code Injection (CVE-2026-9198)."
    # Example generic update (refer to specific vendor repo)
    # pip install --upgrade langflow-ai  
else
    echo "[-] IBM Langflow not detected."
fi

# Check for Apache Tomcat (CVE-2026-34486)
if pgrep -f "catalina" > /dev/null; then
    echo "[+] Apache Tomcat detected."
    echo "[!] ACTION REQUIRED: Review server.xml for encrypted connector settings and patch for CVE-2026-34486."
    echo "[+] Ensure HTTP traffic is redirected to HTTPS and sensitive data is encrypted."
else
    echo "[-] Apache Tomcat not detected."
fi