CVE WatchOct 6, 2026

CVE-2026-105740

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, any authenticated Langflow user can achieve R

CVSS

9.9

Critical

EPSS

0.6%

p47

KEV

—

Exploit Today

0-100

Published: Oct 5, 2026 · Last modified: Oct 6, 2026 · CWE-78

EPSS · 30d

0.6%EPSS · 30 days0.6%

2026-10-062026-10-21

Technical description

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, any authenticated Langflow user can achieve Remote Code Execution (RCE) on the server by adding an MCP server with the "Stdio" transport. The user-supplied command field is passed directly to bash -c "exec {command}" with zero validation, no allowlisting, and no sandboxing. The command executes immediately when the server list is fetched. Additionally, the env field allows arbitrary environment variable injection (e.g., LD_PRELOAD, PATH override). This vulnerability is fixed in 1.9.0.

Official references

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