Path Traversal Vulnerability in Langflow AI-Powered Tool
CVE-2026-42867

6.5MEDIUM

Key Information:

Vendor

Langflow-ai

Status
Langflow
Vendor
CVE Published:
23 June 2026

What is CVE-2026-42867?

Langflow, a tool designed for creating and deploying AI-driven agents and workflows, is vulnerable to a Path Traversal issue found within its Knowledge Bases API (POST /api/v1/knowledge_bases). This vulnerability allows authenticated attackers to leverage improperly sanitized user-supplied knowledge base names to craft file paths. As a result, they can create directories and write files anywhere on the server's filesystem. The issue has been addressed in version 1.9.0, reinforcing the need for timely updates to protect against potential exploitation.

Affected Version(s)

langflow < 1.9.0

References

https://github.com/langflow-ai/langflow/security/advisori...
x_refsource_CONFIRM
https://github.com/langflow-ai/langflow/pull/12337
x_refsource_MISC

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.