high7.5
CVE-2026-55446
Langflow is a tool for building and deploying AI-powered agents and workflows.
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | langflow | < 1.0.19 | 1.0.19 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Langflow | Langflow | before 1.0.19 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-qwqc-p3q8-wcg9
- https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9
- https://github.com/langflow-ai/langflow/pull/3923
- https://github.com/langflow-ai/langflow/blob/v1.0.18/src/backend/base/langflow/api/v1/files.py#L40