IBM Langflow Desktop RCE (CVE-2026-6543) Allows Arbitrary Command Execution
The National Vulnerability Database has detailed CVE-2026-6543, a critical remote code execution (RCE) vulnerability in IBM Langflow Desktop versions 1.0.0 through 1.8.4. This flaw, rated with a CVSS score of 8.8 (HIGH), allows an authenticated attacker to execute arbitrary commands with the privileges of the process running Langflow.
This isn’t just a theoretical bug; it’s a direct pipeline to an organization’s sensitive data. An attacker exploiting this RCE can read critical environment variables, including API keys and database credentials. They can also modify files on the system or leverage the compromised Langflow instance to launch further attacks laterally into the internal network. The impact is severe, enabling full system compromise and data exfiltration.
Defenders must prioritize patching. This vulnerability, categorized as CWE-94 (Improper Control of Generation of Code (‘Code Injection’)), indicates a fundamental flaw in how Langflow handles code execution. The attacker’s calculus here is straightforward: gain initial access, execute commands, and then pivot. This type of vulnerability is a red teamer’s dream and a CISO’s nightmare.
What This Means For You
- If your organization uses IBM Langflow Desktop, immediately identify all instances running versions 1.0.0 through 1.8.4. Prioritize patching these systems to a secure version to prevent arbitrary command execution. Audit logs for any suspicious activity indicating potential exploitation, especially around file modifications or unusual process spawns related to Langflow.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-6543 - Langflow Arbitrary Command Execution via API
title: CVE-2026-6543 - Langflow Arbitrary Command Execution via API
id: scw-2026-04-30-ai-1
status: experimental
level: critical
description: |
Detects the execution of commands within the Langflow process, specifically targeting the use of Python's eval, exec, os.system, or subprocess.run functions, which are likely indicators of exploitation for CVE-2026-6543. This allows an attacker to execute arbitrary commands with the privileges of the Langflow process.
author: SCW Feed Engine (AI-generated)
date: 2026-04-30
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-6543/
tags:
- attack.execution
- attack.t1059
logsource:
category: process_creation
detection:
selection:
Image|contains:
- 'langflow'
CommandLine|contains:
- 'eval'
- 'exec'
- 'os.system'
- 'subprocess.run'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-6543 | RCE | IBM Langflow Desktop versions 1.0.0 through 1.8.4 |
| CVE-2026-6543 | Information Disclosure | Reading sensitive environment variables (API keys, DB credentials) |
| CVE-2026-6543 | Code Injection | Execute arbitrary commands with privileges of the Langflow process |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 01, 2026 at 01:16 UTC |
This content was AI-rewritten and enriched by Shimi's Cyber World based on the original source. All intellectual property rights remain with the original author.
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