---
id: CVE-2026-105741
title: Langflow is a tool for building and deploying AI-powered agents and workflows
summary: >-
  Langflow is a tool for building and deploying AI-powered agents and workflows.
  From 1.5.0 until 1.10.3, an IP spoofing vulnerability in the Model Context
  Protocol (MCP) configuration installation endpoint (POST
  /api/v1/mcp/project/{proje…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L'
cwe:
  - CWE-290
  - CWE-345
vendor: langflow-ai
product: langflow
affected:
  - 'langflow >= 1.5.0, < 1.10.3'
published: '2026-10-05'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T17:17:18.810'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105741'
references:
  - url: >-
      https://github.com/langflow-ai/langflow/commit/1f39a4b9d62c9dfa1b21fa7f85e23a180c351b72
    label: security-advisories@github.com
  - url: >-
      https://github.com/langflow-ai/langflow/commit/94859df33acd70b2a1f816e26d68f5e89a7e5639
    label: security-advisories@github.com
  - url: 'https://github.com/langflow-ai/langflow/pull/13915'
    label: security-advisories@github.com
  - url: 'https://github.com/langflow-ai/langflow/releases/tag/v1.10.3'
    label: security-advisories@github.com
  - url: >-
      https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82
    label: security-advisories@github.com
  - url: >-
      https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105741'
  - url: 'https://github.com/advisories/GHSA-4f6c-2vvp-gw82'
  - url: 'https://github.com/langflow-ai/langflow'
  - url: 'https://pypi.org/project/langflow'
tags:
  - nvd
  - cve.org
  - exploit-available
  - ghsa
  - pip
  - osv
epss: 0.00244
epssPercentile: 0.15512
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-06T16:42:30.466213Z'
ingestedAt: '2026-10-05T21:34:25.115Z'
aliases:
  - GHSA-4f6c-2vvp-gw82
  - PYSEC-2026-4229
ecosystem: pip
patched:
  - langflow 1.10.3
---

## Overview

Langflow is a tool for building and deploying AI-powered agents and workflows. From 1.5.0 until 1.10.3, an IP spoofing vulnerability in the Model Context Protocol (MCP) configuration installation endpoint (POST /api/v1/mcp/project/{project_id}/install) allowed authenticated remote attackers to bypass the "local-only" access restriction. By sending a spoofed X-Forwarded-For: 127.0.0.1 header, an attacker could make the server treat the request as originating from localhost, letting them write/overwrite an MCP client configuration file on the server's filesystem. This vulnerability is fixed in 1.10.3.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-105741)

Affected packages:

- `langflow >= 1.5.0, < 1.10.3`

Patched in:

- `langflow 1.10.3`

Source: https://github.com/advisories/GHSA-4f6c-2vvp-gw82