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CVE-2026-42048

Langflow: Path Traversal in Langflow Knowledge Bases API

Published: May 12, 2026Updated: May 14, 2026 Sources: CVE List NVDCWE-22
NVD MITRE
9.6CVSSCRITICAL
EPSS Score
0.5%
Top 60.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 (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 Vector Breakdown

AV:NAC:LPR:LUI:NS:CC:NI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-22

Affected Products

langflowlangflow-ai
SaaS
AI / ML
langflowlangflow
SaaS
AI / ML / ai-agent-tooling
langflow-aicommercialAI / ML
langflowcommercialAI / MLaka langflow-base, langflow desktop, langflow

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

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

Timeline

Published
May 12, 2026
Last Updated
May 14, 2026

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