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CVE-2026-21445

Langflow Missing Authentication on Critical API Endpoints

Published: Jan 2, 2026Updated: Jan 16, 2026 Sources: CVE List NVD GHSA BDUCWE-306
9.1CRITICAL
NVD MITRE
EPSS Score
20.7%
Top 2.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Nuclei · OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-306

Affected Products

PyPI
package-ecosystem
langflow-base
OSS Libraries
langflow
OSS Libraries
langflow
commercialaka langflow desktop, langflow-base
langflowSaaS
AI / ML / ai-agent-tooling
Сообщество свободного программного обеспечения
oss-projectaka fsf
LangflowOn-prem
OSS Libraries / generic-library
langflow-ai
commercial
langflowSaaS
AI / ML

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
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References

https://github.com/langflow-ai/langflow/commit/3fed9fe1b5658f2c8656dbd73508e113a96e486a
github.com
https://github.com/langflow-ai/langflow/security/advisories/GHSA-c5cp-vx83-jhqx
github.com
https://nvd.nist.gov/vuln/detail/CVE-2026-21445
nvd.nist.gov
and 2 more references View all →
News mentions
2

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