CVE-2026-17623 in Langflow OSS
Summary
by MITRE • 08/05/2026
IBM Langflow OSS 1.0.0 through 1.10.3 could allow a remote authenticated attacker to execute arbitrary commands due to improper validation of the command field in MCP server configurations.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 08/05/2026
This vulnerability exists within IBM Langflow Open Source Software versions 1.0.0 through 1.10.3, representing a critical security flaw that enables remote authenticated attackers to execute arbitrary commands on affected systems. The vulnerability stems from inadequate validation mechanisms within the MCP server configuration components where the command field fails to properly sanitize or validate input parameters. This improper validation creates a command injection pathway that allows attackers with legitimate authentication credentials to manipulate system processes through maliciously crafted command inputs.
The technical implementation of this flaw resides in the MCP server's handling of user-supplied command parameters, which are processed without sufficient input validation or sanitization measures. When authenticated users submit commands through the MCP interface, the system does not adequately filter or escape special characters that could be interpreted as shell commands by the underlying operating system. This vulnerability aligns with CWE-77 and CWE-94 categories, specifically addressing command injection vulnerabilities where insufficient input validation leads to arbitrary code execution. The flaw operates at the application layer and can be exploited through authenticated sessions, making it particularly dangerous in environments where legitimate user credentials might be compromised or when privilege escalation occurs.
From an operational impact perspective, this vulnerability presents significant risks to organizations deploying IBM Langflow OSS within their infrastructure. Successful exploitation could allow attackers to execute malicious commands with the privileges of the affected application process, potentially leading to full system compromise, data exfiltration, or lateral movement within network environments. The remote nature of the attack means that exploitation does not require physical access to the target system, while the authenticated requirement reduces detection probability since legitimate user sessions are being leveraged for malicious purposes. This vulnerability can be particularly devastating in cloud environments or containerized deployments where Langflow might be running with elevated privileges.
Organizations should implement immediate mitigations including upgrading to patched versions of IBM Langflow OSS beyond 1.10.3, implementing network segmentation to limit access to MCP server components, and enforcing strict input validation measures at all application interfaces. Additional protective measures include monitoring authentication logs for unusual command execution patterns, implementing principle of least privilege for user accounts accessing MCP configurations, and conducting thorough security assessments of all related components. The vulnerability demonstrates the importance of validating all user inputs within application frameworks as outlined in defense-in-depth strategies referenced by MITRE ATT&CK framework category T1059, which covers command and scripting interpreters. System administrators should also consider implementing web application firewalls to detect and block suspicious command injection attempts while maintaining regular patch management processes to address similar vulnerabilities across the software supply chain.