CVE-2026-17626 in Langflow
Summary
by MITRE • 08/05/2026
IBM Langflow OSS 1.0.0 through 1.10.3 Langflow could allow an authenticated attacker to read, modify, or expose sensitive host files via Docker-based MCP servers due to incomplete filtering of dangerous Docker volume-mount and device-mapping arguments.
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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 where the application fails to properly validate Docker volume mount and device mapping parameters when executing MCP servers. The flaw stems from insufficient input sanitization that allows authenticated attackers to manipulate Docker container configurations, potentially leading to unauthorized access to host filesystems. When Langflow processes requests to create or configure Docker-based MCP servers, it accepts user-supplied parameters without adequate validation of volume mount paths or device mappings that could enable privilege escalation or data exfiltration.
The technical implementation of this vulnerability occurs at the Docker orchestration layer where Langflow's container management functionality does not properly filter dangerous arguments such as host path bindings, device access permissions, or privileged container configurations. Attackers can exploit this by crafting malicious requests that include volume mount parameters pointing to sensitive host directories like /etc, /root, or other critical system locations. This represents a classic case of insufficient input validation that aligns with CWE-20, which addresses improper input validation in software systems. The vulnerability essentially allows for arbitrary file access and modification capabilities that bypass normal security boundaries between containerized applications and the underlying host operating system.
The operational impact of this vulnerability is significant as it provides authenticated attackers with potential access to sensitive host files and system resources. An attacker could leverage this to read configuration files, extract credentials, modify system binaries, or establish persistent access through compromised container instances. The vulnerability affects systems where Langflow is deployed in environments that utilize Docker-based MCP server functionality, particularly in development or testing scenarios where authentication might be less strictly enforced. This weakness enables techniques aligned with ATT&CK tactic TA0005 (Defense Evasion) and TA0006 (Credential Access) by allowing attackers to bypass container security controls and access host-level resources.
Organizations should implement comprehensive input validation mechanisms that sanitize all user-supplied Docker parameters before processing them in container orchestration workflows. The mitigation strategy involves implementing strict parameter filtering that rejects any volume mount or device mapping operations targeting system-critical directories, ensuring that only explicitly permitted paths are allowed for container mounting operations. Additionally, deployment configurations should enforce least privilege principles by running containers with minimal required permissions and avoiding host path bindings to sensitive locations. Regular security audits of container orchestration parameters and implementation of automated input validation checks would significantly reduce the risk exposure. System administrators should also consider implementing network segmentation controls to limit access to Langflow environments and monitor for suspicious container configuration requests that could indicate exploitation attempts.