CVE-2026-42048

Critical

Published: 12/05/2026(UTC)Translated: 14/06/2026(UTC)NVD NIST

Summary

Langflow, a tool for building and deploying AI agents, is vulnerable to Path Traversal in the Knowledge Bases API (DELETE /api/v1/knowledge_bases) prior to version 1.9.0. An attacker can exploit this flaw to delete arbitrary directories on the server.

Risk Assessment

This vulnerability can lead to data loss and service disruption, posing a significant threat to organizations.

Recommendation

It is recommended to upgrade to version 1.9.0 or later to mitigate this security flaw.

Original NVD description (English source)

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 (DELETE /api/v1/knowledge_bases). This occurs because user-supplied knowledge base names are concatenated directly into file paths without proper sanitization or boundary validation. An authenticated attacker can exploit this flaw to delete arbitrary directories anywhere on the server's filesystem, leading to data loss and potential service disruption. This vulnerability is fixed in 1.9.0.