What is CVE-2026-55446?

CVE-2026-55446 is a high-severity vulnerability in Langflow-ai Langflow, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-06-23.

How severe is CVE-2026-55446?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Langflow-ai Langflow

CVE-2026-55446

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.0.19, an attacker can send a /api/v1/files/upload/ request without any authentication token/cookies and abuse a very long multipart form boundary to…

Vulnerability class: DoS (Denial of Service)

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Langflow-ai Langflow — versions < 1.0.19

Weakness classification (CWE)

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-2026-55446?: CVE-2026-55446 is a high-severity vulnerability in Langflow-ai Langflow, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-06-23.
How severe is CVE-2026-55446?: High severity. CVSS v3 base score is 7.5 out of 10.