CVE-2026-42867

CVE-2026-42867 – Langflow exposed path traversal via the Knowledge Bases API (POST /api/v1/knowledge_bases). The root cause is that user-supplied base names are concatenated into file paths without proper containment checks, allowing an authenticated attacker to create directories and write files...

GHSA-79PH-745M-6WXQ Langflow: Path Traversal in Knowledge Bases API via Creation Endpoint

Summary Langflow 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 can exploit this flaw...