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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-55446

Langflow: Unauthenticated DoS through multipart form boundary file upload

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

langflow-ai langflow

  • < 1.0.19affected

References