CVE-2026-55450

CriticalCVSS 9.3/10Last modified Jun 24, 2026

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.

Metrics

CVSS 3.1 9.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H

Weakness enumeration

CWE-200 CWE-306 CWE-400

Affected software

No affected versions have been published.

Timeline

Published: Jun 23, 2026
Last modified: Jun 24, 2026
NVD status: Analyzed

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