CVE-2026-21445
Langflow Missing Authentication on Critical API Endpoints
HIGH 8.8
At a glance
- Source
- NVD
- EPSS
- EPSS 33.29 % · percentile 98 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Analyzed
Description
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.7.0.dev45, multiple critical API endpoints in Langflow are missing authentication controls. The issue allows any unauthenticated user to access sensitive user conversation data, transaction histories, and perform destructive operations including message deletion. This affects endpoints handling personal data and system operations that should require proper authorization. Version 1.7.0.dev45 contains a patch.
Weaknesses (CWE)
- CWE-306 — Missing Authentication for Critical Function
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 4.0 | HIGH 8.8 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P | GitHub_M |
| CVSS 4.0 | HIGH 8.8 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD · security-advisories@github.com (Secondary) |
| CVSS 3.1 | CRITICAL 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N | NVD · nvd@nist.gov (Primary) |
Advisories
- GHSA-c5cp-vx83-jhqx — Langflow Missing Authentication on Critical API Endpoints
- PYSEC-2026-1524 — Langflow Missing Authentication on Critical API Endpoints
- PYSEC-2026-2571 — Langflow Missing Authentication on Critical API Endpoints
European references
- ENISA EUVD · EUVD-2026-0034
- GCVE · GCVE-0-2026-21445
Affected configurations (NVD CPE)
cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*< 1.7.1
Affected products
| Product | Versions |
|---|---|
| langflow-ai · langflow | affected < 1.7.0.dev45 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |