CVE-2026-42048CRITICAL 9.6EPSS p39.7%

CVE-2026-42048CVE-2026-42048

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.

Scoring

CVSS 3.19.6 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H
EPSS0.52% probability of exploitation · percentile 39.7% · 2026-06-18T12:00:27Z
Published2026-05-12
Last modified2026-05-14

Underlying weaknesses· 1

CWE-22

References

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

1

TypeTargetConfidenceTier
WeaknessImproper Limitation of a Pathname to a Restricted Directory ('Path Traversal')cwe-220%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.