High 7.1Published Oct 5, 2026

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

Updated under an hour ago (Oct 28, 2026, 1:40 PM ET)

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It affects langflow-ai langflow. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.21%, higher than 11% of scored CVEs.

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Every CVE for langflow-ai langflow

Exploited in the last 30 days

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.

CVSS: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
Weakness (CWE): CWE-290, CWE-345
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.21% (percentile 11)
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Oct 6, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

langflow-ai langflow langflow_ai:langflow (from the name)	from 1.5.0, < 1.10.3	CNA record

References

References

https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82	x-refsource-confirm
https://github.com/langflow-ai/langflow/pull/13915	x-refsource-misc
https://github.com/langflow-ai/langflow/commit/1f39a4b9d62c9dfa1b21fa7f85e23a180c351b72	x-refsource-misc
https://github.com/langflow-ai/langflow/commit/94859df33acd70b2a1f816e26d68f5e89a7e5639	x-refsource-misc
https://github.com/langflow-ai/langflow/releases/tag/v1.10.3	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.