Langflow: Path Traversal in Langflow Knowledge Bases API_CVE-2026-42048

9.6 / 10

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H

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 (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.

Basic Information

ID CVE-2026-42048

Source GitHub_M

Published May 12, 2026 at 17:35

Affected Product

Vendor langflow-ai

Product langflow

Version < 1.9.0

Affected Versions langflow-ai langflow < 1.9.0

CWE Classification

CWE-22

References

github.com /langflow-ai/langflow/security/advisories/GHSA-9whx-c884-c68q

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