# Langflow: OS command injection (RCE) via arbitrary command in MCP stdio server configuration

Advisory record · `GHSA-w794-rj3p-xv45`

- **Identifiers:** `GHSA-w794-rj3p-xv45` · `CVE-2026-105697` · `PYSEC-2026-4237` · `PYSEC-2026-4239` · `PYSEC-2026-4241`
- **State:** Confirmed
- **Severity:** CVSS 9.9 Critical
- **Critical:** Yes: CVSS 9+
- **Weakness (CWE):** [CWE-78](https://cwe.mitre.org/data/definitions/78.html)
- **Tags:** [Command injection](https://agentprime.io/advisories/tag/command-injection.md)
- **Published:** 7 Oct 2026
- **Updated:** 15 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 7 Oct 2026, 20:36 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Critical

Critical, because:

- CVSS score 9.9: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected packages

- `langflow` (PyPI): affected `>=1.1.2, <1.10.3`; fixed in `1.10.3`
- `langflow-base` (PyPI): affected `>=0.1.2, <0.10.3`; fixed in `0.10.3`
- `lfx` (PyPI): affected `<1.10.3`; fixed in `1.10.3`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Langflow (PyPI packages langflow, langflow-base and lfx) is vulnerable to OS command injection through MCP stdio server configurations: langflow 1.1.2 to before 1.10.3, langflow-base 0.1.2 to before 0.10.3, and lfx before 1.10.3. An attacker who can reach the MCP server settings or build a flow with an MCP Tools component can supply an arbitrary command that runs on the Langflow host as the process user. With the default auto-login setting, no account is needed. Upgrade to langflow 1.10.3, langflow-base 0.10.3 or lfx 1.10.3.

Written 1 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 9.9 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0095, the 61st percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:08 UTC: First seen by agentprime
- 31 Oct 2026, 14:08 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-w794-rj3p-xv45)

## Sources

- [GitHub Advisory Database: GHSA-w794-rj3p-xv45](https://github.com/advisories/GHSA-w794-rj3p-xv45)
- [OSV: GHSA-w794-rj3p-xv45](https://osv.dev/vulnerability/GHSA-w794-rj3p-xv45)
- <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://nvd.nist.gov/vuln/detail/CVE-2026-105697>
- <https://github.com/langflow-ai/langflow/pull/12290>
- <https://github.com/langflow-ai/langflow/pull/14036>
- <https://github.com/langflow-ai/langflow/commit/eba285edf1dd4a33bf23a9cb8113c991fcdf3d1d>
- <https://github.com/langflow-ai/langflow/commit/efbc4a16e639409d938a4883463d27ef0bc637a0>
- <https://github.com/langflow-ai/langflow>
- <https://github.com/langflow-ai/langflow/releases/tag/v1.10.3>
- <https://www.ox.security/blog/mcp-supply-chain-advisory-rce-vulnerabilities-across-the-ai-ecosystem>
- <https://www.ox.security/blog/the-mother-of-all-ai-supply-chains-critical-systemic-vulnerability-at-the-core-of-the-mcp>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-w794-rj3p-xv45>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-w794-rj3p-xv45/>. Everything for agents: <https://agentprime.io/llms.txt>.