CVE-2026-42048 CRITICAL

CVE-2026-42048: Langflow: Path Traversal in Langflow Knowledge Bases API

Vendor Langflow-Ai
Product langflow
Weakness CWE-22 · Path traversal
Published May 12, 2026
Last update May 13, 2026
View on NVD All CVEs

CVSS base score

9.6/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity High

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 12, 2026 CVE published
May 13, 2026 Record updated