CVE-2026-17633 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 code due to code injection.
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Analysis
by VulDB Data Team • 08/05/2026
IBM Langflow Open Source Software version 1.0.0 through 1.10.3 contains a critical code injection vulnerability that could be exploited by remote authenticated attackers to execute arbitrary code on affected systems. This vulnerability stems from insufficient input validation and sanitization within the application's processing pipeline, allowing maliciously crafted inputs to be interpreted as executable code rather than benign data. The flaw exists in the core workflow execution engine where user-supplied parameters are not properly sanitized before being processed, creating an environment where attackers can inject malicious code that gets executed within the application context.
The technical implementation of this vulnerability aligns with CWE-94, which describes "Improper Control of Generation of Code" and falls under the broader category of code injection flaws. Attackers can leverage this weakness by crafting specially formatted inputs through the Langflow interface or API endpoints, potentially bypassing authentication mechanisms since the vulnerability requires only authenticated access. The attack surface is particularly concerning as it affects the fundamental workflow execution capabilities of the platform, enabling attackers to escalate privileges and gain full control over the affected systems. This vulnerability directly maps to ATT&CK technique T1059.001 which covers "Command and Scripting Interpreter: PowerShell" and T1059.007 for "Command and Scripting Interpreter: Python," as the injection could target these common execution environments.
The operational impact of this vulnerability extends beyond simple code execution, as it could enable attackers to establish persistent backdoors, exfiltrate sensitive data, or disrupt service availability within organizations using affected Langflow deployments. Organizations that rely on Langflow for automated workflow processing and data analysis face significant risk, particularly those with less restrictive access controls or insufficient network segmentation. The vulnerability affects both the web-based interface and programmatic API access points, making it difficult to contain through traditional network perimeter defenses alone. Security teams must consider this weakness as a critical threat vector requiring immediate attention due to its potential for privilege escalation and persistent access.
Mitigation strategies should include immediate deployment of patched versions from IBM, implementing strict input validation and sanitization measures, and establishing comprehensive monitoring for suspicious workflow execution patterns. Organizations should also enforce principle of least privilege access controls, segment Langflow deployments from critical infrastructure, and implement network-based detection mechanisms to identify anomalous code injection attempts. The vulnerability underscores the importance of secure coding practices and regular security assessments in open source software environments where third-party components may introduce unknown risks. Additionally, implementing web application firewalls and runtime application self-protection measures can provide additional defense layers against exploitation attempts targeting this specific code injection flaw.