CVE-2026-42867 — Langflow: Path Traversal in Knowledge Bases API via Creation Endpoint
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, Langflow is vulnerable to Path Traversal in the Knowledge Bases API (POST /api/v1/…
Published: 2026-06-23 · CVSS: 6.5 · CVSS 3.1
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, Langflow is vulnerable to Path Traversal in the Knowledge Bases API (POST /api/v1/knowledge_bases). This occurs because user-supplied knowledge base names are used directly to create file paths without proper sanitization or containment checks. An authenticated attacker can exploit this flaw to create directories and write files anywhere on the server's filesystem. This vulnerability is fixed in 1.9.0.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7