CVE-2026-42048

Published May 12, 2026

Last updated 7 days ago

Overview

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.
Source
security-advisories@github.com
NVD status
Analyzed
Products
langflow

Risk scores

CVSS 3.1

Type
Secondary
Base score
9.6
Impact score
5.8
Exploitability score
3.1
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H
Severity
CRITICAL

Weaknesses

security-advisories@github.com
CWE-22

Social media

Hype score
Not currently trending

Configurations