Vulnerability Description
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, Langflow's /api/v1/monitor router exposes 7 endpoints that perform read, write, and delete operations on user-owned resources — messages, sessions, build artifacts, and LLM transaction logs — without verifying that the authenticated requester owns the targeted resource. Any authenticated user can read, modify, rename, or permanently delete another user's data by supplying the target's resource ID or flow_id. This is a classic IDOR/BOLA vulnerability. Notably, the same source file (monitor.py) contains one correctly-implemented endpoint that uses an ownership check, demonstrating the correct pattern was known but inconsistently applied. This vulnerability is fixed in 1.9.0.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Langflow | Langflow | < 1.9.0 |
Related Weaknesses (CWE)
References
- https://github.com/langflow-ai/langflow/security/advisories/GHSA-9c59-2mvc-vfr8ExploitVendor Advisory
FAQ
What is CVE-2026-33760?
CVE-2026-33760 is a vulnerability with a CVSS score of 8.8 (HIGH). Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, Langflow's /api/v1/monitor router exposes 7 endpoints that perform read, write, and delete operations on ...
How severe is CVE-2026-33760?
CVE-2026-33760 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33760?
Check the references section above for vendor advisories and patch information. Affected products include: Langflow Langflow.