CVE-2026-42048

critical · 9.6

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.

9.6

CVSS

4.4%

EPSS (exploit prob.)

91st

EPSS percentile

2026-05-12

Published

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

Weaknesses

CWE-22

Affected products

Vendor	Product	Affected versions
langflow	langflow	< 1.9.0

Check a specific version with /api/v1/cve/match.

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-42048