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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
NVD MITRE
9.1CVSSCRITICAL
EPSS Score
21.3%
Top 2.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Am I actually vulnerable?1 Nuclei template available — see how to check your systems. How to verify

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 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

langflowlangflow-ai
SaaS
AI / ML
langflow-basePyPIOSS Libraries
langflowPyPIOSS Libraries
langflowlangflow
SaaS
AI / ML / ai-agent-tooling
LangflowСообщество свободного программного обеспечения
On-prem
Operating Systems / linux-distro
langflow-aicommercialAI / ML
pypipackage-ecosystemOSS Libraries
langflowcommercialAI / MLaka langflow-base, langflow desktop, langflow
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

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

Timeline

Published
Jan 2, 2026
Last Updated
Jan 16, 2026
News mentions
2

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