Is CVE-2026-21445 actively exploited?

CVE-2026-21445 has no public evidence of in-the-wild exploitation as of 2026-01-16.

What is the CVSS score for CVE-2026-21445?

CVE-2026-21445 has a CVSS score of 8.8 (HIGH severity). Vector: 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.

How do I patch CVE-2026-21445?

Patch guidance is available from langflow security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-21445.

Fix CVE-2026-21445 - HIGH langflow langflow

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.

CVSS Metrics

Vector: 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
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-306 · Missing Authentication

Metadata

Primary Vendor: LANGFLOW
Published: 1/2/2026
Last Modified: 1/16/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2026-21445

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary