CVE-2026-105740
Critical9.9Langflow 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
- 9.9v3.1
- EPSS (exploit probability)
- 0.6%47th pct
- CISA KEV
- Not listed
EPSS trendFIRST daily scores, last 90 days
Daily values
| Score date | EPSS | Percentile |
|---|---|---|
| 2026-10-20 | 0.6% | 47.2% |
| 2026-10-19 | 0.6% | 47.1% |
| 2026-10-18 | 0.6% | 47.1% |
| 2026-10-16 | 0.6% | 47.0% |
| 2026-10-15 | 0.6% | 47.0% |
| 2026-10-14 | 0.6% | 46.9% |
| 2026-10-13 | 0.6% | 46.7% |
| 2026-10-12 | 0.6% | 46.6% |
| 2026-10-11 | 0.6% | 46.6% |
| 2026-10-10 | 0.6% | 46.6% |
| 2026-10-09 | 0.6% | 46.5% |
| 2026-10-08 | 0.6% | 46.5% |
| 2026-10-07 | 0.6% | 46.5% |
| 2026-10-06 | 0.6% | 46.4% |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H