CVE•Published 2026-06-23•Modified 2026-06-24•2 articles on news•5 live references•NVD data

CVE-2026-55450Langflow · Langflow

Vulnerability data via NVD (ingested)

CVSS v3.1

9.3

CRITICAL

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

EPSS percentile

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Weaknesses (CWE)

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

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.

Timeline

Published 2026-06-23

Modified 2026-06-24

External references

NVD MITRE Exploit-DB trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag2,331 hosts

vuln:CVE-2026-55450

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Langflow Langflow"

All exposed Langflow Langflow instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Langflow"

HTTP body or banner mentions "Langflow" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-55450