vulnerability · Wed 07 Oct 2026 · 20:36 UTC
GHSA-w794-rj3p-xv45: Langflow: OS command injection (RCE) via arbitrary command in MCP stdio server configuration
Filed UTCSource GTH ↗
Before Langflow 1.10.3, the MCP stdio transport launched whatever command / args a user put in an MCP server configuration, with no allowlist and (before 1.10.3) wrapped in bash -c "exec {command} ...". Any user able to reach the MCP server settings ("Settings → MCP Servers → Add MCP Server", POST/PATCH /api/v2/mcp/servers/{server_name}) or to build a flow with the MCP Tools component could add a "server" whose command is an arbitrary OS command (touch, rm -rf, a reverse shell, ...). …
Signals
as the pipeline stamped them- High
- Critical vulnerability — CVSS 9.9
- What to do
- Critical severity — schedule an urgent patch.
CVE
KEV from CISA · EPSS from FIRST| Id | KEV | EPSS | Reference |
|---|---|---|---|
| CVE-2026-105697 | — | 0.47% | NVD ↗ |
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