CVE-2026-18899

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to read arbitrary files due to path traversal...

CVE-2026-18891

IBM Langflow OSS versions 1.0.0 through 1.11.1 is affected by an improper authentication flaw (CWE-287) in the MCP project authentication function. When MCP Composer is enabled, the function omits the default auth_type=none value from the set of modes requiring an API key, causing unauthenticated...

CVE-2026-18729

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote authenticated attacker to execute arbitrary code due to improper control of generation of code...

CVE-2026-18545

IBM Langflow OSS 1.0.0 through 1.11.1 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...

PT-2026-83331

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to obtain sensitive information and inject unauthorized messages due to a namespace collision between user identifiers...

CVE-2026-19295: Improper Neutralization of Directives in Dynamically Evaluated Code

IBM Langflow OSS 1.0.0 through 1.11.1 allows an authenticated attacker to execute arbitrary operating system commands in the server process by saving a flow with a crafted type field value and triggering a build of a wrapper flow that references it. This allowed privilege escalation from...

PT-2026-83333

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote authenticated attacker to execute and read any user's private flow due to improper authorization...

PT-2026-83332

Name of the Vulnerable Software and Affected Versions IBM Langflow OSS versions 1.0.0 through 1.11.1 Description Improper enforcement of security restrictions on the 'A2A' public endpoint allows a remote attacker to execute arbitrary code. Arbitrary code execution occurs when an attacker can run...

CVE-2026-19294: Authorization Bypass Through User-Controlled Key

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote authenticated attacker to execute and read any user's private flow due to improper authorization...

CVE-2026-19286: Improper Control of Generation of Code

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to execute arbitrary code due to improper enforcement of security restrictions on the A2A public endpoint...

CVE-2026-18545: Server-Side Request Forgery (SSRF)

IBM Langflow OSS 1.0.0 through 1.11.1 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-2026-18891: Improper Authentication

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to execute arbitrary flows and access sensitive information due to improper authentication...

PT-2026-83329

Name of the Vulnerable Software and Affected Versions IBM Langflow OSS versions 1.0.0 through 1.11.1 Description Improper authentication allows a remote attacker to execute arbitrary flows and access sensitive information. Recommendations Update IBM Langflow OSS to a version later than 1.11.1...

CVE-2026-18904: Authorization Bypass Through User-Controlled Key

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to obtain sensitive information and inject unauthorized messages due to a namespace collision between user identifiers...

PT-2026-83327

Name of the Vulnerable Software and Affected Versions IBM Langflow OSS versions 1.0.0 through 1.11.1 Description An authenticated attacker can perform server-side request forgery SSRF, a flaw that allows the system to be coerced into making unauthorized requests. This can be used for network...

PT-2026-83330

Name of the Vulnerable Software and Affected Versions IBM Langflow OSS versions 1.0.0 through 1.11.1 Description A path traversal issue exists that could allow a remote attacker to read arbitrary files from the system. Path traversal is a flaw that allows an attacker to access files and directori...

CVE-2026-18899: Improper Limitation of a Pathname to a Restricted Directory

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to read arbitrary files due to path traversal...

CVE-2026-18729: Improper Control of Generation of Code

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote authenticated attacker to execute arbitrary code due to improper control of generation of code...

Security Bulletin: Langflow OSS is affected by server-side request forgery in provider validation and API request functionality

Summary Langflow OSS includes outbound network request functionality for provider validation and API request execution. Weaknesses in request destination validation and enforcement could allow authenticated users to induce requests to unintended internal or external network locations, which may...

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...