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 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.

CVSS 3.1

9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS

1.0% chance of exploitation in the next 30 days; higher than 64% of CVEs (scores of 2026-10-25)

CWE

CWE-78

Published

2026-10-05

Modified

2026-10-06

Record from

the NVD, synced 2026-10-19

References

• https://github.com/langflow-ai/langflow/commit/efbc4a16e639409d938a4883463d27ef0bc637a0
• https://github.com/langflow-ai/langflow/pull/12290
• https://github.com/langflow-ai/langflow/security/advisories/GHSA-7w94-79vh-5mr2
• https://github.com/langflow-ai/langflow/security/advisories/GHSA-w794-rj3p-xv45
• https://github.com/langflow-ai/langflow/security/advisories/GHSA-7w94-79vh-5mr2

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