CVE-2026-105741
Langflow: IP Spoofing Bypass via `X-Forwarded-For` Allowing Remote Configuration Write
HIGH 7.1
En bref
- Source
- NVD
- EPSS
- EPSS 0.24 % · centile 16 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- GitHub_M
- Statut NVD
- Awaiting Analysis
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.
Faiblesses (CWE)
- CWE-290 — Contournement d'authentification par usurpation
- CWE-345 — Vérification insuffisante de l'authenticité des données
Références
- https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82
- https://github.com/langflow-ai/langflow/pull/13915
- https://github.com/langflow-ai/langflow/commit/1f39a4b9d62c9dfa1b21fa7f85e23a180c351b72
- https://github.com/langflow-ai/langflow/commit/94859df33acd70b2a1f816e26d68f5e89a7e5639
- https://github.com/langflow-ai/langflow/releases/tag/v1.10.3
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L | GitHub_M |
| CVSS 3.1 | HIGH 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L | NVD · security-advisories@github.com (Secondary) |
Avis
- GHSA-4f6c-2vvp-gw82 — Langflow: IP Spoofing Bypass via `X-Forwarded-For` Allowing Remote Configuration Write
- PYSEC-2026-4229 — Langflow: IP Spoofing Bypass via `X-Forwarded-For` Allowing Remote Configuration Write
Références européennes
- ENISA EUVD · EUVD-2026-92800
- GCVE · GCVE-0-2026-105741
Produits affectés
| Produit | Versions |
|---|---|
| langflow-ai · langflow | affected >= 1.5.0, < 1.10.3 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |