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.
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Tue, 23 Jun 2026 17:30:00 +0000
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| Description | 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. | |
| Title | Langflow: Path Traversal in Knowledge Bases API via Creation Endpoint | |
| Weaknesses | CWE-22 | |
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-06-23T17:02:43.824Z
Reserved: 2026-04-30T18:49:06.710Z
Link: CVE-2026-42867
Updated: 2026-06-23T17:01:48.325Z
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