External risk intelligence

IBM Langflow OSS Command Injection Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-79724

IBM Langflow is a low-code tool for building AI and machine learning workflows. These applications are commonly deployed as web-based interfaces or API endpoints intended for interaction, often making them reachable via the network or internet to facilitate integration and user access in development and production environments.

OS Command Injection

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This vulnerability impacts IBM Langflow, a tool used for building AI and machine learning workflows. It could allow an attacker to execute unauthorized commands on the operating system, posing a significant risk if exploited. The primary concern is to confirm if this specific technology is in use and assess any potential exposure.

Unauthorized command execution is possible.
Confirms potential exposure if technology is in use.
Assess relevance and direct impact to your systems.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by sending specially crafted input to an exposed IBM Langflow instance over the network. Because the application does not properly handle certain characters used in operating system commands, it can be tricked into executing arbitrary commands on the server. This could lead to the attacker gaining control over the affected system.

No authentication required to trigger.
Vulnerable when processing user input.
Risk of arbitrary code execution on server.

Live Threat

Current exploitation, exposure, and threat context

A critical vulnerability in IBM Langflow OSS could enable a remote attacker to execute arbitrary operating system commands. This occurs when special characters in OS commands are not properly handled, potentially allowing unauthorized actions on the affected system when supported by the advisory.

Arbitrary OS commands could be executed.
Improper command neutralization allows exposure.
System compromise is a realistic consequence.

Operational Fix

Recommended remediation, mitigation, and detection steps

To address this critical vulnerability in IBM Langflow, application owners, platform teams, and potentially security operations must collaborate. The immediate first step is to pinpoint all instances of the affected technology across the environment. Once identified, confirm exposure, assess business criticality, and identify the accountable system owner to develop a targeted remediation plan.

Application and platform teams own remediation.
Verify all IBM Langflow instances.
Plan OS command execution risk mitigation.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is IBM Langflow OSS used for?

IBM Langflow OSS is a low-code software platform designed to help developers and data scientists build, prototype, and deploy complex artificial intelligence and machine learning workflows. It functions as a visual interface where users connect components to process data and automate tasks, often running as a web-based service or API endpoint to facilitate easy access and integration within development or production environments.

What does CVE-2026-79724 mean for system security?

This vulnerability is classified as Improper Neutralization of Special Elements used in an OS Command (CWE-78). In plain English, the software fails to properly filter or sanitize user input before passing it to the underlying operating system. Because of this flaw, an attacker can input specially crafted commands that the server interprets as legitimate system instructions, effectively allowing them to run unauthorized code with the privileges of the application.

How is this command injection vulnerability triggered?

An attacker triggers this flaw by sending malicious input to a vulnerable Langflow instance over the network. Because the application processes this input without adequate security checks, it inadvertently executes the attacker's commands. Importantly, this does not require any prior authentication or special user access; however, the vulnerability is not triggered unless the system is actively processing the specific, malicious input designed to exploit this handling error.

Is my instance of IBM Langflow at risk?

According to Halo Surface Signal, this vulnerability is considered a high-priority concern for instances reachable via the internet or internal networks. Because Langflow is frequently deployed as a web-based interface to support user interaction and API connectivity, it is often exposed to broader network access. If your specific instance is accessible to users or systems beyond a strictly isolated environment, it faces a higher probability of exposure to this remote attack vector.

What is the first step to address CVE-2026-79724?

The immediate priority is to conduct a comprehensive inventory to locate all active IBM Langflow OSS instances within your environment. Once you have a complete list of these assets, verify their current configuration and network accessibility. Finally, identify the specific business owners for each instance to coordinate an assessment of the potential impact and prepare for the necessary remediation steps provided by the vendor.

References

www.ibm.com/support/pages/node/7286666

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.