Security Bulletin: Langflow is vulnerable to information disclosure due to cross-user MCP tool cache collision and incomplete secret scrubbing on public flows

Summary Langflow contains two authenticated information disclosure vulnerabilities. The MCP Tools component caches discovered tools in a shared process-local cache keyed only by the MCP server display name without including the user, session, flow, or resolved configuration; when two authenticate...

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...

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...

CVE-2026-13448 Langflow is affected by remote code execution, denial of service, path traversal, and exposed credentials due to multiple unauthenticated and insufficiently authorized API endpoints

IBM Langflow OSS 1.0.0 through 1.10.1 Lanflow OSS contains an unauthenticated remote code execution vulnerability in the public flow build endpoint /api/v1/buildpublictmp/flowid/flow . The vulnerability stems from an incomplete denylist in the validatepublicflownocodeexecution function that fails...

CVE-2026-13448

IBM Langflow OSS 1.0.0 through 1.10.1 Lanflow OSS contains an unauthenticated remote code execution vulnerability in the public flow build endpoint /api/v1/buildpublictmp/flowid/flow . The vulnerability stems from an incomplete denylist in the validatepublicflownocodeexecution function that fails...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the POST /api/lunchflow/link endpoint, which insufficiently validates user-supplied URLs and fails to restrict access to internal or sensitive network addresses. An attacker can cause the server to...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the POST /api/lunchflow/link endpoint, which insufficiently validates user-supplied URLs and fails to restrict access to internal or sensitive network addresses. An attacker can cause the server to...

CVE-2026-33017

Langflow is a tool for building and deploying AI-powered agents and workflows. In versions prior to 1.9.0, the POST /api/v1/buildpublictmp/flowid/flow endpoint allows building public flows without requiring authentication. When the optional data parameter is supplied, the endpoint uses...

Critical Langflow Flaw CVE-2026-33017 Triggers Attacks within 20 Hours of Disclosure

A critical security flaw impacting Langflow has come under active exploitation within 20 hours of public disclosure, highlighting the speed at which threat actors weaponize newly published vulnerabilities. The security defect, tracked as CVE-2026-33017 CVSS score: 9.3, is a case of missing...

CVE-2026-33017

Langflow CVE-2026-33017 describes unauthenticated remote code execution via the public build endpoint /api/v1/build_public_tmp/{flow_id}/flow on versions before 1.9.0. Attackers can supply attacker-controlled flow data containing arbitrary Python code; the flow build path passes this data into th...

Langflow Unauth RCE

Langflow versions prior to 1.9.0 are susceptible to unauthenticated remote code execution through the /api/v1/buildpublictmp//flow endpoint. A remote and unauthenticated attacker can send crafted HTTP requests to execute arbitrary code. Module Options msf use...

PT-2026-28281

Name of the Vulnerable Software and Affected Versions Langflow version 1.7.3 Description The POST /api/v1/build public tmp/flow id/flow endpoint allows building public flows without authentication. If the optional data parameter is provided, the system uses attacker-controlled flow data instead o...

GHSA-5993-7P27-66G5 Langflow vulnerable to Server-Side Request Forgery

Vulnerability Overview Langflow provides an API Request component that can issue arbitrary HTTP requests within a flow. This component takes a user-supplied URL, performs only normalization and basic format checks, and then sends the request using a server-side httpx client. It does not block...

PT-2024-20990 · Ruvaroa · Ruvaroa

Name of the Vulnerable Software and Affected Versions: RuvarOA versions 6.01 through 12.01 Description: The issue is related to a SQL injection vulnerability. This vulnerability can be exploited via the id parameter at the "/WorkFlow/wf office file history show.aspx" API endpoint. Recommendations...