Langflow: Path Traversal in Langflow Knowledge Bases API
48Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 9.6epss 4.4%
from disclosure to weapon9 days
Published on NVDMay 12
1st PoC+9d
exploitation probability
4.4%top 10% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H
Affected products
langflow-ai · langflowpublic PoCs found — 1
githubgithub.com/EQSTLab/CVE-2026-42048★ 2⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.