CVE-2026-12946 in Langflow OSS
Summary
by MITRE • 07/30/2026
IBM Langflow OSS 1.0.0 through 1.10.0 could allow a remote attacker to inject arbitrary code on the system, due to the improper control of user input code.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 07/30/2026
This vulnerability exists within IBM Langflow Open Source Software versions 1.0.0 through 1.10.0, representing a critical security flaw that enables remote code execution through improper input validation. The vulnerability stems from inadequate controls over user-provided code inputs, creating an environment where malicious actors can inject arbitrary commands that execute with the privileges of the affected system. This type of vulnerability falls under CWE-94, which specifically addresses Improper Control of Generation of Code, and aligns with ATT&CK technique T1059.001 for Command and Scripting Interpreter.
The technical flaw manifests when the application processes user input without sufficient sanitization or validation mechanisms, allowing attackers to submit code that gets executed directly within the system context. This improper handling of user inputs creates a pathway for remote exploitation where an attacker can craft malicious payloads that bypass normal security controls. The vulnerability's impact extends beyond simple code injection as it provides attackers with the ability to execute arbitrary commands on the target system, potentially leading to full system compromise.
Operational consequences of this vulnerability are severe and multifaceted, as it enables attackers to gain unauthorized access to systems running vulnerable versions of IBM Langflow. The remote nature of the attack means that exploitation can occur from anywhere on the network without requiring physical access or prior authentication. Attackers can leverage this vulnerability to establish persistent access, escalate privileges, exfiltrate sensitive data, or deploy additional malware. The affected environment may include development servers, production systems, or any infrastructure where Langflow is deployed and used for workflow automation.
Organizations should immediately implement mitigations including updating to patched versions of IBM Langflow, implementing strict input validation controls, and applying network segmentation measures to limit exposure. The remediation process requires thorough vulnerability scanning across all affected systems, followed by immediate patching of the identified vulnerable components. Additionally, implementing web application firewalls and monitoring for suspicious code injection patterns can provide additional layers of defense. Security teams must also conduct comprehensive assessments of their Langflow deployments to identify any potential attack vectors that could be exploited through this vulnerability.