CVE-2026-105697 langflow-ai CVE debrief

Who should care

Langflow users, administrators of Langflow instances, and security teams responsible for monitoring and patching vulnerabilities in Python packages should prioritize patching to version 1.10.3 or later. They should also restrict access to MCP server settings and the MCP Tools component, and monitor for suspicious activity on Langflow instances to prevent potential exploitation and minimize operational impacts.

Why it matters

CVE-2026-105697 is a critical vulnerability in Langflow that allows for OS command injection, potentially leading to remote code execution. Langflow users and administrators should prioritize patching to version 1.10.3 or later and restrict access to MCP server settings and the MCP Tools component.

• Remote code execution as the Langflow process user
• Potential for data breaches or system compromise
• Need for immediate patching or mitigation
• Verification of Langflow instance security

Technical summary

The MCP stdio transport in Langflow launched user-supplied commands without validation, allowing for OS command injection. This was exploitable by users with access to MCP server settings or the MCP Tools component. The issue was fully fixed in Langflow version 1.10.3, which validated user input and restricted command execution. Langflow users should upgrade to version 1.10.3 or later to prevent exploitation. The vulnerability allowed for remote code execution as the Langflow process user, potentially leading to data breaches or system compromise.

Defensive priority

High

Recommended defensive actions

• Upgrade Langflow to version 1.10.3 or later
• Restrict access to MCP server settings and MCP Tools component
• Monitor for suspicious activity on Langflow instances
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The vulnerability was reported by an unknown source and documented in the CVE record and NVD entry. The issue was fixed in Langflow version 1.10.3. However, details about the exploitation and impact are limited. To verify, defenders should review the official advisory, assess their exposure, and check for suspicious activity on Langflow instances.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.