MEDIUM

CVE-2026-42867

Langflow Langflow 2026-06-23 CVSS v3.1

CVSS

6.5

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 (POST /api/v1/knowledge_bases). This occurs because user-supplied knowledge base names are used directly to create file paths without proper sanitization or containment checks. An authenticated attacker can exploit this flaw to create directories and write files anywhere on the server's filesystem. This vulnerability is fixed in 1.9.0.

Weakness (CWE)

CWE-22 Path Traversal

EPSS Score

0.47%

Probability of exploitation in next 30 days

39.6th percentile

References

https://github.com/langflow-ai/langflow/pull/12337 Patch, Issue Tracking https://github.com/langflow-ai/langflow/security/advisories/GHSA-79ph-745m-6wxq Exploit, Vendor Advisory

View on dbcve.org

Base CVE data derived from NVD (public domain). Enrichment by dbcve.org (CC-BY-4.0). Fetched via API.

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