CVE-2026-105741
published 2026-10-05CVE-2026-105741: 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…
PriorityP344high7.1CVSS 3.1
AVNACLPRLUINSUCNIHAL
EPSS
0.21%
10.7th percentile
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.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| langflow-ai | langflow | — | — |
| langflow | langflow | >= 1.5.0 < 1.10.3 | 1.10.3 |
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GHSA
Langflow: IP Spoofing Bypass via `X-Forwarded-For` Allowing Remote Configuration Write
ghsa·2026-10-07
CVE-2026-105741 [HIGH] CWE-290 Langflow: IP Spoofing Bypass via `X-Forwarded-For` Allowing Remote Configuration Write
Langflow: IP Spoofing Bypass via `X-Forwarded-For` Allowing Remote Configuration Write
**Description**:
### Summary
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.
### Details
The vulnerability lived in the `get_client_ip` helper, used to enforce the local-only gate for `install_mcp_config`. It trusted the leftmost (fully client-controlled) entry of `X-Forwarded-For` uncondit
VulDB
langflow-ai Langflow up to 1.10.2 Model Context Protocol access control (EUVD-2026-92800)
vuldb·2026-10-05·CVSS 7.1
CVE-2026-105741 [HIGH] langflow-ai Langflow up to 1.10.2 Model Context Protocol access control (EUVD-2026-92800)
A vulnerability described as problematic has been identified in langflow-ai Langflow up to 1.10.2. This issue affects some unknown processing of the component Model Context Protocol. Executing a manipulation can lead to improper access controls.
The identification of this vulnerability is CVE-2026-105741. The attack may be launched remotely. There is no exploit available.
Upgrading the affected component is recommended.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://github.com/langflow-ai/langflow/commit/1f39a4b9d62c9dfa1b21fa7f85e23a180c351b72https://github.com/langflow-ai/langflow/commit/94859df33acd70b2a1f816e26d68f5e89a7e5639https://github.com/langflow-ai/langflow/pull/13915https://github.com/langflow-ai/langflow/releases/tag/v1.10.3https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82
2026-10-05
Published