CVE-2026-6596 Details
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.
A vulnerability allowing unrestricted file uploads has been identified in Langflow versions through 1.1.0. This issue arises from a deprecated API endpoint that lacks authentication and ownership validation, enabling remote users to upload files to the server. The vulnerability is located in the 'create_upload_file' function within 'src/backend/base/Langflow/api/v1/endpoints.py'. The absence of proper checks can lead to denial-of-service conditions by filling up server disk space or inodes.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Apr 20, 2026CISA-ADP
Assessed Apr 20, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://gist.github.com/chenhouser2025/c2aabfdee41009cfe45d28a9924742a0 | [email protected] | ExploitTechnical Description |
| https://vuldb.com/submit/791919 | [email protected] | ExploitTechnical Description |
| https://vuldb.com/vuln/358231 | [email protected] | AdvisoryExploitPartial Content |
| https://vuldb.com/vuln/358231/cti | [email protected] | Content Wall |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-284 | Improper Access Control | [email protected] |
| CWE-434 | Unrestricted Upload of File with Dangerous Type | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| langflow-ai langflow | <= 1.1.0 (semver) |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | Data Remediation | [email protected] |
| Apr 20, 2026 | New CVE Received | [email protected] |