Langflow: Weak Fernet Key via random.seed()

Summary Langflow uses Python's random module Mersenne Twister, a non-cryptographic PRNG seeded with the SECRETKEY to derive the Fernet encryption key for all stored user credentials API keys, LLM provider secrets, database passwords. When the SECRETKEY is shorter than 32 characters — a common...

EUVD-2026-53547

Langflow: Weak Fernet Key via random.seed...

EUVD-2026-45272

Langflow: Unauthenticated Flow Execution via Webhook Authentication Bypass...

Langflow: Title Authenticated Remote Code Execution in validate_code via Malicious Decorators Description

Summary: A critical Authenticated Remote Code Execution RCE vulnerability exists in the validatecode function of Langflow. The /api/v1/validate/code endpoint, meant to validate user-supplied code, leverages Python's exec function. While it attempts to restrict execution to function definitions, i...

EUVD-2026-91120

Langflow: Title Authenticated Remote Code Execution in validatecode via Malicious Decorators Description...

GHSA-W584-2H2R-2HVF Langflow: Title Authenticated Remote Code Execution in validate_code via Malicious Decorators Description

Summary: A critical Authenticated Remote Code Execution RCE vulnerability exists in the validatecode function of Langflow. The /api/v1/validate/code endpoint, meant to validate user-supplied code, leverages Python's exec function. While it attempts to restrict execution to function definitions, i...

EUVD-2026-26838

Langflow: Prompt injection in Langflow Smart Transform can lead to code execution...

CVE-2026-105740

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, any authenticated Langflow user can achieve Remote Code Execution RCE on the server by adding an MCP server with the "Stdio" transport. The user-supplied command field is passed directly to bash -c "exe...

CVE-2026-105698

Langflow is a tool for building and deploying AI-powered agents and workflows. From 1.0.0 until 1.10.1, Langflow did not verify flow ownership in the deprecated POST /api/v1/build/flowid/vertices and POST /api/v1/build/flowid/vertices/vertexid handlers. Through version 1.7.1, an unauthenticated...

CVE-2026-105699

Langflow is a tool for building and deploying AI-powered agents and workflows. From 1.6.8 until 1.9.1, Langflow authenticated access to the project identifier in a project-scoped MCP connection but did not authorize the resource URI supplied to resources/read. readresource forwarded the...

CVE-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 Protocol MCP configuration installation endpoint POST /api/v1/mcp/project/projectid/install allowed authenticated remote attackers to bypass th...

CVE-2026-105697

Langflow is a tool for building and deploying AI-powered agents and workflows. Before Langflow 1.10.3, the MCP stdio transport launched whatever command / args a user put in an MCP server configuration, with no allowlist and before 1.10.3 wrapped in bash -c "exec command ...". Any user able to...

CVE-2026-105741

The software Langflow (versions 1.5.0 through 1.10.3) is vulnerable to an IP spoofing issue within the Model Context Protocol (MCP) configuration installation endpoint (POST /api/v1/mcp/project/{project_id}/install). An authenticated remote attacker can bypass "local-only" access restrictions by ...

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

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/projectid/install allowed authenticated remote attackers to bypass th...

CVE-2026-105740

Langflow versions prior to 1.9.0 are vulnerable to Remote Code Execution (RCE) via the MCP Stdio transport . An authenticated user can execute arbitrary OS commands because the user-supplied command field is passed directly to bash -c "exec {command}" without validation, allowlisting, or sandboxi...

CVE-2026-105740 Langflow: Authenticated RCE via MCP Stdio transport allows any user to execute arbitrary OS commands on the server

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, any authenticated Langflow user can achieve Remote Code Execution RCE on the server by adding an MCP server with the "Stdio" transport. The user-supplied command field is passed directly to bash -c "exe...

CVE-2026-105699 Langflow: Authenticated Cross-Project File Disclosure via Unscoped MCP Resource Handlers

Langflow is a tool for building and deploying AI-powered agents and workflows. From 1.6.8 until 1.9.1, Langflow authenticated access to the project identifier in a project-scoped MCP connection but did not authorize the resource URI supplied to resources/read. readresource forwarded the...

CVE-2026-105699

Langflow versions 1.6.8 through 1.9.1 are vulnerable to an authenticated cross-project file disclosure due to unscscoped MCP resource handlers. The application validates project identifiers but fails to authorize the resource URI provided to resources/read. Consequently, an attacker can bypass pr...

CVE-2026-105698 Langflow: Cross-user flow access and vertex execution via deprecated /api/v1/build/{flow_id}/vertices endpoints

Langflow is a tool for building and deploying AI-powered agents and workflows. From 1.0.0 until 1.10.1, Langflow did not verify flow ownership in the deprecated POST /api/v1/build/flowid/vertices and POST /api/v1/build/flowid/vertices/vertexid handlers. Through version 1.7.1, an unauthenticated...

CVE-2026-105698

Langflow (versions 1.0.0 through 1.10.0) is vulnerable to cross-user flow access and unauthorized vertex execution due to a missing ownership check in deprecated handlers. Specifically, the POST /api/v1/build/{flow_id}/vertices and POST /api/v1/build/{flow_id}/vertices/{vertex_id} endpoints faile...