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.
References
| Link | Resource |
|---|---|
| https://github.com/langflow-ai/langflow/pull/12337 | Patch Issue Tracking |
| https://github.com/langflow-ai/langflow/security/advisories/GHSA-79ph-745m-6wxq | Exploit Vendor Advisory |
| https://github.com/langflow-ai/langflow/security/advisories/GHSA-79ph-745m-6wxq | Exploit Vendor Advisory |
Configurations
History
No history.
Information
Published : 2026-06-23 17:16
Updated : 2026-06-26 17:09
NVD link : CVE-2026-42867
Mitre link : CVE-2026-42867
CVE.ORG link : CVE-2026-42867
JSON object : View
Products Affected
langflow
- langflow
CWE
CWE-22
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
