CVE-2026-42048

Published: May 12, 2026Modified: May 14, 2026

9.6

Vector

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

Exploitability: 3.1 / Impact: 5.8

Source: security-advisories@github.com (Secondary)

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.

Affected (1)

Products: Langflow: Langflow

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Langflow Langflow	Before 1.9.0

Related CWEs

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

References (2)

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

Source: security-advisories@github.com

ExploitVendor Advisory

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

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

ExploitVendor Advisory

Timeline

No history available yet.