Langflow - Broken Access Control

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.7.0.dev45, multiple critical API endpoints in Langflow are missing authentication controls. The issue allows any unauthenticated user to access sensitive user conversation data, transaction histories...

Langflow < 1.9.1 - Unauthenticated File Upload

Langflow 1.9.1 contains an unrestricted file upload caused by lack of upload limitations, letting unauthenticated attackers exhaust server space and leak absolute file paths, exploit requires network access. id: CVE-2026-55450 info: name: Langflow 1.9.1 - Unauthenticated File Upload author: xtr0n...

IBM Langflow - Remote Code Execution

IBM Langflow OSS 1.0.0 through 1.10.0 contains a remote code execution caused by chaining /api/v1/autologin and /api/v1/validate/code endpoints, letting unauthenticated attackers execute arbitrary code remotely, exploit requires no authentication. id: CVE-2026-9198 info: name: IBM Langflow - Remo...

Security Bulletin: Langflow is affected by security vulnerabilities in Model Context Protocol features

Summary Langflow uses Model Context Protocol MCP features to manage external server connections, project access, file resources, and local client integration. Weaknesses in MCP command and configuration validation, authentication and authorization enforcement, file resource handling, and request...

Langflow < 1.7.0 - Path Traversal

Langflow 1.7.1 contains a path traversal caused by insufficient filtering of foldername and filename parameters in downloadprofilepicture endpoint, letting attackers read secretkey across directories, exploit requires crafted request. id: CVE-2026-33497 info: name: Langflow 1.7.0 - Path Traversal...

Security Bulletin: Unauthenticated Session History Access via Public Flow Execution

Summary A session ID namespace bypass vulnerability existed in Langflow OSS' POST /api/v1/buildpublictmp/flowid/flow endpoint that allowed unauthenticated attackers to access chat history from other users' sessions. The endpoint accepted an inputs.session parameter that could override the session...

Langflow < 1.3.0 - Remote Code Execution via validate_code() exec()

Langflow contains a remote code execution caused by inclusion of functionality from untrusted control sphere in the execglobals parameter at the validate endpoint, letting remote attackers execute arbitrary code as root, exploit requires no authentication. id: CVE-2026-0770 info: name: Langflow...

Langflow < 1.9.0 - Remote Code Execution

Langflow versions prior to 1.9.0 are vulnerable to unauthenticated remote code execution RCE via the buildpublictmp endpoint. Attackers can submit a manipulated flow JSON containing Python code that is executed during the build process without proper sandboxing. id: CVE-2026-33017 info: name:...

Langflow <= 1.8.4 - Path Traversal to RCE via File Upload

The application contains a path traversal vulnerability caused by unsanitized 'filename' parameter in the 'POST /api/v2/files' multipart form data, letting attackers write files to arbitrary filesystem locations, exploit requires crafted request. id: CVE-2026-5027 info: name: Langflow = 1.8.4 -...

CVE-2026-12946

IBM Langflow OSS 1.0.0 through 1.10.0 could allow a remote attacker to inject arbitrary code on the system, due to the improper control of user input code...

CVE-2026-13444

IBM Langflow OSS 1.0.0 through 1.10.1 can allow an attacker to access another user's private vector documents by creating their own flow with matching Chroma persistdirectory and collectionname values. The attacker receives exact victim content in their workflow output despite having no...

CVE-2026-13435

IBM Langflow OSS 1.0.0 through 1.10.1 contains an improper input validation vulnerability in the PythonREPL sandbox implementation...

CVE-2026-12942

IBM Langflow OSS 1.0.0 through 1.10.1 could allow a remote attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing "dot dot " sequences /.. / to view arbitrary files on the system...

CVE-2026-10700

IBM Langflow OSS 1.0.0 through 1.8.4 contains multiple broken access control vulnerabilities in its file handling API that allow unauthorized access to user files.The /api/v1/files/images/flowid/filename endpoint does not enforce authentication or authorization checks, allowing unauthenticated...

CVE-2026-12946 Remote Code Execution in CUGA Component CodeAgent

IBM Langflow OSS 1.0.0 through 1.10.0 could allow a remote attacker to inject arbitrary code on the system, due to the improper control of user input code...

EUVD-2026-51273

IBM Langflow OSS 1.0.0 through 1.10.0 could allow a remote attacker to inject arbitrary code on the system, due to the improper control of user input code...

CVE-2026-12946

Summary: IBM Langflow OSS 1.0.0–1.10.0 is affected by a vulnerability in the CUGA Component CodeAgent that permits remote code execution through improper control of user input code. The issue resides in CodeAgent’s Python code execution path, enabling an attacker (authenticated) to run arbitrary ...

CVE-2026-12940

IBM Langflow OSS 1.0.0 through 1.10.1 are vulnerable to unauthenticated remote code execution via environment variable injection in the MCP Model Context Protocol stdio launcher. The vulnerability exists in src/lfx/src/lfx/base/mcp/util.py where the DANGEROUSENVVARS blocklist fails to include...

CVE-2026-12945

IBM Langflow OSS 1.0.0 through 1.10.1 allows authenticated users to access and manipulate other users' build jobs through improper access control on log retrieval and unauthenticated build endpoints...

EUVD-2026-51247

IBM Langflow OSS 1.0.0 through 1.8.4 contains multiple broken access control vulnerabilities in its file handling API that allow unauthorized access to user files.The /api/v1/files/images/flowid/filename endpoint does not enforce authentication or authorization checks, allowing unauthenticated...