GitHub Advisoryadvisory · PyPI
GHSA-vvfc-fp59-m92g Langflow: DoS Through Lack of File Size Restriction via Deprecated Unauthenticated File Upload API
MEDIUM
Official page ↗
- Aliases
- CVE-2026-6596
- Ecosystem
- PyPI
- Packages
- langflow-base
- Severity
- Moderate
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- Weaknesses
- CWE-284
- Reviewed
- 2026-04-24
Affected packages
• PyPI langflow-base: < 0.9.1 → fixed in 0.9.1
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.
Related
Alias · CVE (1)
- CVE-2026-6596 A security flaw has been discovered in langflow-ai langflow up to 1.1.0. vulnerability
Weakness · CWE (1)
- CWE-284 Improper Access Control weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-6596 advisory
- https://github.com/langflow-ai/langflow/commit/b5662446bc8c54d928e278d3d26ad95b62425815 web
- https://gist.github.com/chenhouser2025/c2aabfdee41009cfe45d28a9924742a0 web
- https://github.com/langflow-ai/langflow package
- 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 web