CVE-2026-55446

Published: Jun 23, 2026Modified: Jun 24, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: security-advisories@github.com (Secondary)

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 (1)

Products: Langflow: Langflow

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Langflow Langflow	Before 1.0.19

Related CWEs

Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

References (3)

https://github.com/langflow-ai/langflow/pull/3923

Source: security-advisories@github.com

Issue TrackingPatch

https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9

Source: security-advisories@github.com

ExploitPatchVendor Advisory

https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

ExploitPatchVendor Advisory

Timeline

No history available yet.