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CVE-2026-105741— Langflow: IP Spoofing Bypass via `X-Forwarded-For` Allowing Remote Configuration Write

Quick assessment

Affected
langflow-ai langflow
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Langflow 是一款用于构建和部署 AI 驱动的智能体和工作流的工具。在版本 1.5.0 至 1.10.3 中，模型上下文协议（Model Context Protocol, MCP）配置安装端点（POST /api/v1/mcp/project/{project_id}/install）存在 IP 地址欺骗漏洞。该漏洞允许经过身份验证的远程攻击者绕过“仅限本地访问”的安全限制。攻击者通过发送伪造的 请求头，可以使服务器将该请求视为来自本地主机（localhost），从而在服务器文件系统上写入或覆盖 MCP 客

CVSS 7.1 · High
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I. Basic Information for CVE-2026-105741

Vulnerability Information
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Vulnerability Title
Langflow: IP Spoofing Bypass via `X-Forwarded-For` Allowing Remote Configuration Write
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
langflow-ai langflow >= 1.5.0, < 1.10.3 -

II. Public POCs for CVE-2026-105741

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III. Intelligence Information for CVE-2026-105741

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Other References for CVE-2026-105741 (5)

Same Patch Batch · langflow-ai · 2026-10-05 · 5 CVEs total

CVE-2026-105697 9.9 CRITICAL Langflow: OS command injection (RCE) via arbitrary command in MCP stdio server configurati
CVE-2026-105740 9.9 CRITICAL Langflow: Authenticated RCE via MCP Stdio transport allows any user to execute arbitrary O
CVE-2026-105699 7.1 HIGH Langflow: Authenticated Cross-Project File Disclosure via Unscoped MCP Resource Handlers
CVE-2026-105698 5.4 MEDIUM Langflow: Cross-user flow access and vertex execution via deprecated /api/v1/build/{flow_i

IV. Related Vulnerabilities

Same product: langflow
Same vendor: langflow-ai
Same weakness: CWE-290

V. Comments for CVE-2026-105741

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