Langflow: DoS Through Lack of File Size Restriction via Deprecated Unauthenticated File Upload API
GHSA-vvfc-fp59-m92g · CVE-2026-6596 · PYSEC-2026-2572
Published · Modified
AI SAST
Find this class of vulnerability in your own code
Corgea's AI-native static analysis detects vulnerabilities like this one across your repositories, ranks them by exploitability, and returns review-ready fixes.
Description
A security flaw has been discovered in langflow-ai langflow up to 1.1.0. This issue affects the function create_upload_file of the file src/backend/base/Langflow/api/v1/endpoints.py of the component API Endpoint. The manipulation results in unrestricted upload. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
References
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-6596
- WEB https://github.com/langflow-ai/langflow/commit/b5662446bc8c54d928e278d3d26ad95b62425815
- WEB https://gist.github.com/chenhouser2025/c2aabfdee41009cfe45d28a9924742a0
- PACKAGE https://github.com/langflow-ai/langflow
- WEB https://github.com/langflow-ai/langflow/commits/v1.9.1
- WEB https://vuldb.com/submit/791919
- WEB https://vuldb.com/vuln/358231
- WEB https://vuldb.com/vuln/358231/cti
Ready to move
Start Securing
Free, no credit card | First findings in minutes