by Kastro
Paper/Archive/CVE-2026-21445

CVE-2026-21445

langflow-ai langflow — Langflow Missing Authentication on Critical API Endpoints

EPSS 33%CVSS 9.1
critical.is priorityof 100
47
CVSS 9.1 (NVD)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 98.4.984 × 2019.7No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
langflow< 1.7.0.dev45–CNA

Scores by source

NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
GitHub_M (CNA)8.8CVSS: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
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/langflow-ai/langflow/security/advisories/GHSA-c5cp-vx83-jhqxrefgithub.com/langflow-ai/langflow/commit/3fed9fe1b5658f2c8656dbd73508e113a96e486a