Critical severity9.3NVD Advisory· Published Jun 23, 2026· Updated Jun 24, 2026
CVE-2026-55450
CVE-2026-55450
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
langflowPyPI | < 1.9.1 | 1.9.1 |
Affected products
3cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*range: <1.9.1
- (no CPE)range: <1.9.1
Patches
Vulnerability mechanics
References
3- github.com/langflow-ai/langflow/pull/12831nvdIssue TrackingPatchWEB
- github.com/langflow-ai/langflow/security/advisories/GHSA-x223-p2gf-v735nvdExploitPatchVendor AdvisoryWEB
- github.com/advisories/GHSA-x223-p2gf-v735ghsaADVISORY
News mentions
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