9.1

CVE-2026-21445: langflow-ai langflow

CVSS: 9.1v3.1CriticalAnalyzed
AliasesGHSA-c5cp-vx83-jhqxPYSEC-2026-1524PYSEC-2026-2571
Published 02-01-2026Last modified 26-02-2026
Open JSON

Vulnerability summary

CVE-2026-21445 is a critical (CVSS 9.1) vulnerability in langflow-ai langflow. EPSS estimates a 33.29% chance of exploitation in the next 30 days, higher than 98.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (NVD)
EPSS score
33.29%
0%100%
High · -0.42 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 02-01-2026
    PublishedVulnerability first disclosed.
  2. 26-02-2026
    Last modifiedVulnerability information updated.

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

4 scores · 3 sources · 2 versions

EPSS trend

Probability

33.29%

Chance of exploitation in the next 30 days

Percentile

98%

Versus all other CVEs

30-day change

-0.42 pp

From 33.71% on 20-09-2026

20-09-202620-10-2026
EPSS score
33.29%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Langflow

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

PyPI2 products
  • langflow< 1.7.1
  • langflow-base< 0.7.1
Langflow1 product
Langflow-ai1 product

3 vendors · 4 products

References

8 links