CVE-2026-21445

Name: CVE-2026-21445
Creator: NVD / NIST
Published: 2026-01-02T20:16:17.88+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 20.66%

Last modified Jun 17, 2026

CVE-2026-21445 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 20.66% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS 4.0

8.8/10

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

EPSS Probability

20.66%

97.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-306

Affected Software

Vendor	Product	Versions
Langflow	Langflow	< 1.7.1

References

https://github.com/langflow-ai/langflow/commit/3fed9fe1b5658f2c8656dbd73508e113a96e486aPatch
https://github.com/langflow-ai/langflow/security/advisories/GHSA-c5cp-vx83-jhqxExploit, Vendor Advisory

Timeline

Published: Jan 2, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-21445?

How severe is CVE-2026-21445?

CVE-2026-21445 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 20.66% probability of exploitation in the next 30 days.

How do I fix CVE-2026-21445?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-21445?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST