CVE-2026-105741 (GCVE-0-2026-105741)

Vulnerability from cvelistv5 – Published: 2026-10-05 20:56 – Updated: 2026-10-05 20:56
VLAI
Title
Langflow: IP Spoofing Bypass via `X-Forwarded-For` Allowing Remote Configuration Write
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/{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.
Severity
7.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
CWE
  • CWE-290 - Authentication Bypass by Spoofing
  • CWE-345 - Insufficient Verification of Data Authenticity
Assigner
References
Impacted products
Vendor Product Version CPE status
langflow-ai langflow Affected: >= 1.5.0, < 1.10.3
guessed Create a notification for this product.
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        }
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          "tags": [
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          ],
          "url": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82"
        },
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        "discovery": "UNKNOWN"
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      "title": "Langflow: IP Spoofing Bypass via `X-Forwarded-For` Allowing Remote Configuration Write"
    }
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  "cveMetadata": {
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    "cveId": "CVE-2026-105741",
    "datePublished": "2026-10-05T20:56:00.060Z",
    "dateReserved": "2026-10-05T19:11:07.946Z",
    "dateUpdated": "2026-10-05T20:56:00.060Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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                "vendor": "langflow-ai",
                "versions": [
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                    "version": "\u003e= 1.5.0, \u003c 1.10.3"
                  }
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        "cveTags": [],
        "descriptions": [
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          }
        ],
        "id": "CVE-2026-105741",
        "lastModified": "2026-10-05T21:16:35.740",
        "metrics": {
          "cvssMetricV31": [
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                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
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                "privilegesRequired": "LOW",
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              "type": "Secondary"
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        "references": [
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    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.