CVE-2026-55446 — Langflow: Unauthenticated DoS through multipart form boundary file upload
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 t…
Published: 2026-06-23 · CVSS: 7.5 · CVSS 3.1
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 make the langflow app unusable for all users for an indefinite amount of time. This vulnerability is fixed in 1.0.19.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7