CVE-2026-97673 in Langflow OSS
Summary
by MITRE • 10/07/2026
IBM Langflow OSS 1.0.0 through 1.12.2 could allow a remote authenticated attacker to execute arbitrary code due to improper input validation.
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified in IBM Langflow versions 1.0.0 through 1.12.2 represents a critical security flaw stemming from insufficient sanitization and validation of user-supplied data within the application's core processing logic. As an open-source framework designed for building large language model applications, Langflow handles complex inputs that are often processed dynamically to generate code or execute specific operations. The improper input validation allows a remote authenticated attacker to inject malicious payloads into these inputs. Because the system fails to adequately distinguish between legitimate data and executable commands, it processes the injected content as valid instructions, leading directly to arbitrary code execution on the host server where Langflow is deployed. This type of flaw is fundamentally categorized under CWE-94 Improper Control of Generation of Code or Command, which highlights the failure to neutralize special elements that could be interpreted by an interpreter in a way that produces unintended security implications.
The operational impact of this vulnerability is severe due to its potential for full system compromise. Since Langflow typically runs with elevated privileges necessary to interact with various APIs and execute model inference tasks, successful exploitation grants the attacker equivalent access rights. This enables the execution of arbitrary commands on the underlying operating system, which can lead to data exfiltration, modification or destruction of critical application files, and further lateral movement within the network infrastructure. The requirement for authentication does not mitigate this risk significantly in many enterprise environments where internal users may have varying levels of trust but still possess valid credentials. An attacker with any level of authenticated access can leverage this flaw to bypass intended security boundaries, effectively turning a development or orchestration tool into an entry point for deeper system intrusion. This aligns closely with the MITRE ATT&CK technique T1059 Command and Scripting Interpreter, where adversaries use built-in operating system utilities to execute commands without deploying additional malware tools, thereby reducing detection likelihood by security monitoring solutions that focus on external file execution.
Mitigation strategies must address both immediate remediation and long-term architectural resilience. The primary defense is the immediate upgrade of IBM Langflow to a version later than 1.12.2, where these input validation mechanisms have been corrected according to vendor advisories. In environments where upgrading is not immediately feasible, network-level controls should be implemented to restrict access to the Langflow interface exclusively to trusted IP ranges and enforce strict multi-factor authentication for all user accounts. Additionally, deploying Web Application Firewalls with rules specifically tuned to detect command injection patterns can provide a layer of defense in depth by blocking malicious payloads before they reach the application logic. From an operational security perspective, running Langflow within isolated containers or virtual machines with minimal privileges ensures that even if code execution occurs, the blast radius is contained and cannot easily escalate to compromise the host system or other critical services. Regular auditing of input handling routines across all custom nodes and integrations developed on top of Langflow is also recommended to prevent similar vulnerabilities from being introduced through third-party extensions or user-defined components.