Horizon Alert
Summary of the vulnerability and why it matters
This critical vulnerability in Langflow allows an authenticated user to delete files and directories on the server. Because the tool handles user-provided names directly in file operations, an attacker can bypass intended restrictions. This could lead to significant data loss and disrupt AI-powered services.
- Can affect any Langflow deployment.
- Leads to data loss or service disruption.
- Requires existing access to exploit.
Attack Path
How an attacker could exploit the issue
An authenticated attacker can exploit this path traversal flaw in Langflow to delete arbitrary directories on the server's filesystem. This is achieved by manipulating knowledge base names passed to the Knowledge Bases API, allowing them to control file paths and remove critical data or configuration files. Such an action could lead to significant data loss or disrupt the application's operation.
- Requires authenticated access.
- Targets the Knowledge Bases API.
- Deletes arbitrary directories.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability allows an authenticated attacker to delete arbitrary directories. While requiring authentication, the ability to impact filesystem integrity makes it a serious threat, especially if Langflow instances are exposed externally. The core issue stems from improper handling of user-supplied names in an API endpoint.
- Vulnerability is in API.
- Affects file system deletion.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
Teams should prioritize patching Langflow to version 1.9.0 or later immediately due to the critical path traversal vulnerability. If patching is not feasible, implement strict access controls and network segmentation to limit exposure of the affected API.
- Upgrade Langflow to 1.9.0.
- Restrict API access and monitor for deletion activity.
- Validate all filesystem paths.
