Security Bulletin: Unauthenticated Remote Code Execution via Auto-Login Bypass and Code Validation

Summary A vulnerability allowed unauthenticated attackers to achieve remote code execution on default-configured instances. The vulnerability combined two distinct issues: an unauthenticated endpoint that issued superuser bearer tokens to any network caller, and a code validation endpoint that...

Security Bulletin: Code Injection Vulnerability in Code Validation Endpoint

Summary A code injection vulnerability was identified in the code validation endpoint that allowed authenticated users to execute arbitrary code on the server. The vulnerability existed in the validation logic which compiled and executed function definitions to check for import errors. Attackers...

Security Bulletin: Insufficient Authentication Brute Force Protection on Login Endpoint

Summary A rate limiting capability exists within the product to restrict the number of authentication attempts permitted per IP address per minute against the login endpoint POST /api/v1/login. This control is configurable via the LANGFLOWRATELIMITENABLED environment variable, which defaults to...

EUVD-2026-53577

IBM Langflow OSS 1.0.0 through 1.10.3 could allow a remote authenticated attacker to execute arbitrary code due to code injection...

CVE-2026-7658 Langflow OSS is affected by arbitrary code execution in custom component validation and trusted code enforcement

IBM Langflow OSS 1.0.0 through 1.10.3 does not properly validate the username field, allowing attackers to inject path traversal sequences and bypass containment checks. This enables multiple severe impacts, including arbitrary directory deletion, cross-tenant data destruction, and JWT signing ke...

CVE-2026-10547

IBM Langflow OSS 1.0.0 through 1.10.3 does not properly validate ownership in the deprecated POST /api/v1/build/flowid/vertices endpoint, allowing an authenticated user to inject arbitrary graph data into a shared cache for any flow. This may result in cross-user cache pollution, unauthorized...

CVE-2026-7869 Langflow OSS is affected by arbitrary code execution in custom component validation and trusted code enforcement

IBM Langflow OSS 1.0.0 through 1.10.3 is vulnerable to Path Traversal in the Knowledge Bases API POST /api/v1/knowledgebases. This occurs because user-supplied knowledge base names are used directly to create file paths without proper sanitization or containment checks. An authenticated attacker...

Security Bulletin: Langflow OSS is affected by arbitrary code execution in custom component validation and trusted code enforcement

Summary Langflow OSS supports custom Python components and validation of component code for component development workflows. Weaknesses in custom component execution paths, validation endpoints, and trusted template enforcement could allow authenticated users to execute arbitrary Python code or...

CVE-2026-9081 Langflow OSS is affected by server-side request forgery in provider validation and API request functionality

IBM Langflow OSS 1.0.0 through 1.10.3, and 1.0.0 through 1.10.3 contains a Server-Side Request Forgery SSRF vulnerability in the validatemodelproviderkey function for the Ollama provider. The function accepts a user-supplied OLLAMABASEURL parameter and passes it directly to requests.get without...

CVE-2026-9081

IBM Langflow OSS (versions 1.0.0–1.10.3) is affected by an SSRF in the Ollama provider due to validate_model_provider_key() accepting a user-supplied OLLAMA_BASE_URL and passing it directly to requests.get() without validating scheme/host allowlisting or private IP filtering. This can allow an at...

CVE-2026-17630

IBM Langflow OSS 1.0.0 through 1.10.3 could allow a remote attacker to execute arbitrary code due to improper validation of configuration parameters...

CVE-2026-17623

IBM Langflow OSS 1.0.0 through 1.10.3 could allow a remote authenticated attacker to execute arbitrary commands due to improper validation of the command field in MCP server configurations...

CVE-2026-17623

Langflow OSS 1.0.0–1.10.3 is affected by CVE-2026-17623: a remote authenticated attacker can execute arbitrary commands due to improper validation of the command field in MCP server configurations. Affected product is Langflow OSS (versions 1.0.0–1.10.3). The root cause is inadequate validation o...

CVE-2026-7646

IBM Langflow OSS 1.0.0 through 1.10.3 allows users to read arbitrary files from the server filesystem, including other users' uploaded documents, the JWT signing secret, the SQLite database, and process environment variables, by sending a crafted MCP resources/read request with a URL-encoded path...

IBM Langflow OSS authorization issue vulnerability (CNVD-2026-31200)

IBM Langflow OSS is an open-source low-code visualization AI workflow building tool developed by IBM. It enables developers to quickly build, deploy, and iterate AI agents and RAG applications by dragging and dropping components. Additionally, it supports deep customization using Python to...

IBM Langflow OSS command injection vulnerability

IBM Langflow OSS is an open-source low-code visualization AI workflow building tool developed by IBM. It enables developers to quickly build, deploy, and iterate AI agents and RAG applications through drag-and-drop components. Additionally, it supports deep customization using Python to integrate...

IBM Langflow OSS code injection vulnerability

IBM Langflow OSS is an open-source low-code visualization AI workflow building tool developed by IBM. It enables developers to quickly build, deploy, and iterate AI agents and RAG applications by dragging and dropping components. Additionally, it supports deep customization using Python to...

IBM Langflow OSS path traversal vulnerability

IBM Langflow OSS is an open-source low-code visual AI workflow building tool developed by IBM. It enables developers to quickly build, deploy, and iterate AI agents and RAG applications by dragging and dropping components. Additionally, it supports deep customization using Python to integrate wit...

IBM Langflow OSS configuration error vulnerability

IBM Langflow OSS is an open-source low-code visualization AI workflow building tool developed by IBM. It enables developers to quickly build, deploy, and iterate AI agents and RAG applications by dragging and dropping components. Additionally, it supports deep customization using Python to...

CVE-2026-12940 Langflow is affected by remote code execution due to multiple unauthenticated and insufficiently authorized API endpoints

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...