CVE-2026-93674 in Langflow OSS
Summary
by MITRE • 10/07/2026
IBM Langflow OSS 1.0.0 through 1.12.2 could allow a remote attacker to execute arbitrary code due to improper neutralization of special elements used in an OS command.
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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 rooted in the failure to properly sanitize user-supplied input before its inclusion in operating system commands. This specific weakness is classified under Common Weakness Enumeration as CWE-78, which denotes Improper Neutralization of Special Elements used in an OS Command, commonly known as OS command injection. The core technical issue arises when the application accepts external data and incorporates it directly into a shell command string without adequate validation or escaping mechanisms. In many software architectures, particularly those involving dynamic workflow engines like Langflow, user inputs are often processed to determine execution paths or parameters for underlying system utilities. When these inputs contain maliciously crafted sequences designed to mimic valid commands or inject additional instructions, the operating system interprets them as part of the command line rather than literal data strings. This lack of separation between code and data allows an attacker to manipulate the intended logic of the application by appending new commands that execute with the privileges of the user account running the Langflow service.
The operational impact of this vulnerability is severe, potentially leading to full system compromise if the vulnerable process runs with elevated permissions such as root or administrator rights. An unauthenticated remote attacker can exploit this flaw by sending specially crafted HTTP requests containing shell metacharacters such as semicolons, pipes, ampersands, or backticks within input fields that are subsequently passed to OS-level commands. Successful exploitation enables the execution of arbitrary code on the host system, which may result in unauthorized access to sensitive data, modification or destruction of files, installation of malware, or use of the compromised server as a pivot point for further attacks against internal network resources. The ability to execute commands remotely without authentication significantly lowers the barrier for entry, making this vulnerability attractive to automated scanning tools and opportunistic attackers seeking quick wins in exposed environments.
From an industry standard perspective, this flaw aligns with ATT&CK technique T1059, specifically sub-technique 004 which covers Command and Scripting Interpreter abuse. The attack vector typically involves the attacker interacting directly with the application interface to inject payloads that leverage local scripting capabilities or shell interpreters available on the target operating system. Defense in depth strategies are essential for mitigating such risks. Organizations should immediately upgrade IBM Langflow to version 1.12.3 or later, where this issue has been addressed through improved input validation and command construction practices. In addition to patching, it is advisable to implement strict input sanitization routines that whitelist allowed characters rather than relying solely on blacklist approaches which can be bypassed using encoding tricks or alternative syntaxes. Running the application with minimal necessary privileges further reduces the blast radius of any potential exploitation attempt. Network-level controls such as web application firewalls may also provide an additional layer of detection and blocking for known injection patterns, although they should not replace proper code remediation.