CVE-2026-105740: Langflow

The National Vulnerability Database (NVD) record says that before 1.9.0, any authenticated Langflow user can achieve remote code execution on the server by adding a Model Context Protocol (MCP) server with the "Stdio" transport; fixed in 1.9.0.

The record

Kind

Vulnerability

Source record

CVE-2026-105740: Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, any authenticat (National Vulnerability Database record)

Record published

2026-10-05

Posted here

2026-10-12

World

Software agents · Enterprise work agents

Controls concerned

Containment and isolation C-E5

Checked

Checked against its record on 2026-10-22 by a reader who did not draft it; report verification/reports/SIG-2026-10-12-002-2026-10-22.md.

A signal's controls are the ones its record points at, the exposure; a case's controls are the ones its records show were absent or failed, so the two can differ.

Corrections

Changes to what this signal says, with the reason. Every earlier version is kept.

• 2026-10-22: Summary. Found in an independent read against the record on 22 October 2026: the record's claim was stated in the Register's own voice; it is now attributed to the record, with the fix (CVE record CVE-2026-105740).
  Show the change

  Before: 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.

  After: The National Vulnerability Database (NVD) record says that before 1.9.0, any authenticated Langflow user can achieve remote code execution on the server by adding a Model Context Protocol (MCP) server with the "Stdio" transport; fixed in 1.9.0.

What a signal is. A signal records what a primary record says; it assigns no fault. It is lighter than a case: one dated item from one record, tagged with the world, sector and controls it touches. It becomes a case when it meets the bar for one.

Newer: CVE-2026-104850: MCP TypeScript SDK
Older: CVE-2026-105697: Langflow