CVEvulnerability

CVE-2026-55450

9.3 CRITICAL Published 2026-06-23 Modified 2026-10-25 Official page ↗
Status
Analyzed
Published
2026-06-23
Last modified
2026-10-25
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.3 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H
Weaknesses
CWE-200, CWE-306, CWE-400

Description

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.1, unauthenticated users can upload any amount of data to the server without any limitations. No need for any prior knowledge, only network access to Langflow. This can lead to space exhaustion on the server. In addition, in the response, the absolute path of the uploaded file is reported to the attacker, which is an information leak that can assist in chaining other primitives. This vulnerability is fixed in 1.9.1.

Affected configurations

• langflow langflow (< 1.9.1)

Related

Weakness · CWE (3)

  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor weakness
  • CWE-306 Missing Authentication for Critical Functionality weakness
  • CWE-400 Uncontrolled Resource Consumption weakness

References