Missing Authentication for Critical Function

Overview Affected versions of this package are vulnerable to Missing Authentication for Critical Function via the createuploadfile function. An attacker can exhaust server disk space and obtain sensitive file system information by uploading arbitrary files without authentication and receiving...

GHSA-X223-P2GF-V735 Langflow: Unauthenticated file upload leads to DoS (space exhaustion) and information leak

Summary Unauthenticated users can upload any amount of data to the server without any limitations. No need for any prior knowledge, only network access to Langflow. This can lead to space exhaustion on the server. In adition, in the response, the absolute path of the uploaded file is reported to...

PT-2026-50598

Name of the Vulnerable Software and Affected Versions Langflow versions prior to 1.9.1 Description Unauthenticated users with network access can upload unlimited amounts of data to the server, which can lead to disk space exhaustion and a resulting denial-of-service. Additionally, the server...

GHSA-V5FF-9Q35-Q26F Langflow: Unauthenticated RCE in Shareable Playgrounds

Summary The "Shareable Playground" or "Public Flows" in code contains a critical RCE vulnerability. Simply sharing a flow exposes the deployment to RCE risk by authenticated users. Tested on commit 2d67402b1dbaefcbce85a244d4a6cd5e4bda1cfe Details Shareable Playground feature works by enabling the...

Langflow: IDOR/BOLA in Monitor API — Missing Ownership Enforcement on 7 Endpoints

Summary Langflow's /api/v1/monitor router exposes 7 endpoints that perform read, write, and delete operations on user-owned resources — messages, sessions, build artifacts, and LLM transaction logs — without verifying that the authenticated requester owns the targeted resource. Any authenticated...

GHSA-9C59-2MVC-VFR8 Langflow: IDOR/BOLA in Monitor API — Missing Ownership Enforcement on 7 Endpoints

Summary Langflow's /api/v1/monitor router exposes 7 endpoints that perform read, write, and delete operations on user-owned resources — messages, sessions, build artifacts, and LLM transaction logs — without verifying that the authenticated requester owns the targeted resource. Any authenticated...

Authorization Bypass Through User-Controlled Key

Overview Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key via the monitor API endpoints, which lack proper ownership enforcement. An attacker can read, modify, rename, or permanently delete another user's messages, sessions, build artifacts, and...

PT-2026-50141

Name of the Vulnerable Software and Affected Versions Langflow versions prior to 1.9.0 Description Langflow contains a path traversal flaw in the Knowledge Bases API endpoint 'POST /api/v1/knowledge bases'. The issue resides in the create knowledge base function, where the name variable is used t...

PT-2026-49342

Name of the Vulnerable Software and Affected Versions Langflow versions prior to 1.10.0 Description The Shareable Playground feature, also known as Public Flows, allows unauthenticated users to execute workflows via a public link. A flaw in this feature enables arbitrary file reading depending on...

Security Bulletin: Arbitrary File Write and Remote Code Execution Vulnerability in Langflow v2 API

Summary IBM Langflow Desktop contains a critical vulnerability in its v2 API file handling mechanism where the POST /api/v2/files/ endpoint improperly processes multipart upload filenames without sanitization, allowing path traversal and arbitrary file write outside intended directories; this fla...

Security Bulletin: upload filename directly from the multipart Content-Disposition header without sanitization

Summary Langflow OSS 1.2.0 - 1.8.4 are affected by a critical arbitrary file write vulnerability in the files endpoint due to improper handling of uploaded filenames. The application extracts the filename directly from the multipart Content-Disposition header without sanitization and uses unsafe...

Security Bulletin: Unauthenticated Insecure Direct Object Reference (IDOR) Vulnerability in Langflow Desktop Image Download Endpoint

Summary IBM Langflow Desktop contains a vulnerability in its image retrieval functionality where the GET /api/v1/files/images/flowid/filename endpoint fails to enforce authentication and ownership validation, allowing any unauthenticated user to access image files by supplying a valid flow...

Security Bulletin: Langflow OSS Unauthenticated IDOR on Image Downloads

Summary Langflow OSS versions 1.0.0 - 1.8.4 are affected by an insecure direct object reference vulnerability in the image download endpoint due to missing authentication and authorization checks. The images endpoint serves image files without verifying user identity or ownership. An user who get...

CVE-2026-7787

IBM Langflow OSS 1.0.0 through 1.9.1 could allow an authenticated user to read or modify sensitive information by bypassing authentication using insecure direct object references...

CVE-2026-7787

IBM Langflow OSS 1.0.0 through 1.9.1 could allow an authenticated user to read or modify sensitive information by bypassing authentication using insecure direct object references...

CVE-2026-3341

IBM Langflow Desktop 1.0.0 through 1.9.2 IBM Langflow is vulnerable to server-side request forgery SSRF. This may allow an authenticated attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating other attacks...

CVE-2026-3341 IBM Langflow Desktop 1.0.0 - 1.9.2 DNS Rebinding Bypasses SSRF Protection Allowing Access to Internal Services

IBM Langflow Desktop 1.0.0 through 1.9.2 IBM Langflow is vulnerable to server-side request forgery SSRF. This may allow an authenticated attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating other attacks...

EUVD-2026-36254

IBM Langflow Desktop 1.0.0 through 1.9.2 IBM Langflow is vulnerable to server-side request forgery SSRF. This may allow an authenticated attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating other attacks...

CVE-2026-3341

CVE-2026-3341 affects IBM Langflow Desktop 1.0.0–1.9.2. The root cause is a TOCTOU DNS rebinding flaw in SSRF protection: validate_url_for_ssrf() uses socket.getaddrinfo(), while httpx.AsyncClient() conducts a separate DNS lookup during connection, allowing an attacker-controlled DNS domain with ...

CVE-2026-3341 IBM Langflow Desktop 1.0.0 - 1.9.2 DNS Rebinding Bypasses SSRF Protection Allowing Access to Internal Services

IBM Langflow Desktop 1.0.0 through 1.9.2 IBM Langflow is vulnerable to server-side request forgery SSRF. This may allow an authenticated attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating other attacks...