CVE-2026-55450
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.1, unauthenticated users can upload any amount of data to the server without any limitations. No need for any prior knowledge, only network access to Langflow. This can lead to space exhaustion on the server. In addition, in the response, the absolute path of the uploaded file is reported to the attacker, which is an information leak that can assist in chaining other primitives. This vulnerability is fixed in 1.9.1.
- Affected products
- Langflow
- Langflow
- < 1.9.1
- Fix
- Available
- CVSS 3.1
- 9.3 CRITICAL
- EPSS
- 11.8% (96th percentile)
- Weakness
- CWE-306, CWE-400, CWE-200
- NVD status
- Analyzed
- Published
- 2026-06-23
CVE-2026-55450 at NVD
No indexed exploits for CVE-2026-55450 yet
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No exploit for CVE-2026-55450 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.