---
id: "CVE-2026-104328"
kind: "vulnerability"
aliases: ["CVE-2026-104328"]
title: "Langflow: authenticated user can run OS commands on the server"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "ai-tooling"
products: []
ecosystems: []
tags: ["ai-tooling", "langflow", "python", "self-hosted"]
not_affected_if: ["versions-outside-range"]
published_at: "2026-10-29T16:17:44+00:00"
first_seen_at: "2026-10-29T16:25:54+00:00"
updated_at: "2026-10-29T16:29:16+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-104328", "first_seen_at": "2026-10-29T16:25:54+00:00"}]
---

# Langflow: authenticated user can run OS commands on the server

IBM Langflow OSS versions 1.0.0 through 1.12.3 fail to neutralize special characters passed to an OS command. A logged-in remote attacker can use this to execute arbitrary code on the host running Langflow.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Langflow version with `langflow --version` or `pip show langflow` and compare it to the affected range 1.0.0 through 1.12.3.
- Confirm whether the Langflow instance is reachable from the internet or untrusted networks.

## Fix

- Move Langflow OSS to a version above `1.12.3`; the exact fixed version is unknown from the sources.

## Timeline

- 2026-10-29T16:25:54+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-104328

## From the sources

IBM Langflow OSS 1.0.0 through 1.12.3 could allow a remote authenticated attacker to execute arbitrary code due to improper neutralization of special elements used in an OS command.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_