What is CVE-2026-42867?

CVE-2026-42867 is a medium-severity vulnerability in Langflow-ai Langflow, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-06-23.

How severe is CVE-2026-42867?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Path Traversal in Langflow-ai Langflow

CVE-2026-42867

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…

Vulnerability class: Path Traversal (Directory Traversal)

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.

Affected products

Langflow-ai Langflow — versions < 1.9.0

Weakness classification (CWE)

CWE-22 — Path Traversal

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-42867?: CVE-2026-42867 is a medium-severity vulnerability in Langflow-ai Langflow, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-06-23.
How severe is CVE-2026-42867?: Medium severity. CVSS v3 base score is 6.5 out of 10.