What is CVE-2026-55450?

CVE-2026-55450 is a critical-severity vulnerability in Langflow-ai Langflow, classified under Information Disclosure. CVSS score: 9.3/10. Published 2026-06-23.

How severe is CVE-2026-55450?

Critical severity. CVSS v3 base score is 9.3 out of 10.

Auth bypass in Langflow-ai Langflow

CVE-2026-55450

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…

Vulnerability class: Information Disclosure

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H.

Affected products

Langflow-ai Langflow — versions < 1.9.1

Weakness classification (CWE)

CWE-200 — Information Disclosure
CWE-306 — Missing Authentication for Critical Function
CWE-400 — Uncontrolled Resource Consumption

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-55450?: CVE-2026-55450 is a critical-severity vulnerability in Langflow-ai Langflow, classified under Information Disclosure. CVSS score: 9.3/10. Published 2026-06-23.
How severe is CVE-2026-55450?: Critical severity. CVSS v3 base score is 9.3 out of 10.