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 make the langflow app unusable for all users for an indefinite amount of time. This vulnerability is fixed in 1.0.19.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/langflow-ai/langflow/pull/3923	Issue Tracking Patch
https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9	Exploit Patch Vendor Advisory
https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9	Exploit Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-06-23 17:17

Updated : 2026-06-24 13:50

NVD link : CVE-2026-55446

Mitre link : CVE-2026-55446

CVE.ORG link : CVE-2026-55446

JSON object : View

Products Affected

langflow

langflow

CWE

CWE-400

Uncontrolled Resource Consumption

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