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.
Advisories
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-qwqc-p3q8-wcg9 | Langflow: Unauthenticated DoS through multipart form boundary file upload |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Wed, 24 Jun 2026 16:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Langflow
Langflow langflow |
|
| Vendors & Products |
Langflow
Langflow langflow |
Tue, 23 Jun 2026 18:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Tue, 23 Jun 2026 16:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Langflow: Unauthenticated DoS through multipart form boundary file upload | |
| Weaknesses | CWE-400 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-06-23T17:56:37.766Z
Reserved: 2026-06-16T21:59:57.018Z
Link: CVE-2026-55446
Updated: 2026-06-23T17:56:26.114Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-06-24T16:00:06Z
Weaknesses
Github GHSA