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AI / ML CVE-2026-21445

CRITICAL
Missing Authentication for Critical Function (CWE-306)
2026-01-02 security-advisories@github.com GHSA-c5cp-vx83-jhqx
Authentication Bypass AI / ML Langflow
9.1
CVSS 3.1 · GitHub Advisory
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Severity by source

GitHub Advisory PRIMARY
9.1 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

4
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Jan 16, 2026 - 18:32 vuln.today
Public exploit code
Patch released
Jan 16, 2026 - 18:32 nvd
Patch available
CVE Published
Jan 02, 2026 - 20:16 nvd
CRITICAL 9.1

DescriptionGitHub Advisory

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.

AnalysisAI

Langflow before 1.7.0.dev45 exposes multiple API endpoints without authentication, allowing unauthenticated access to user conversations, transaction data, and message deletion. Critical for AI workflow platforms that handle sensitive prompt data.

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Send unauthenticated HTTP request to sensitive API endpoint
Exploit
Access user conversation data and transaction histories
Execution
Perform message deletion operations
Impact
Exfiltrate or destroy sensitive information
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Vulnerability AssessmentAI

Exploitation Langflow versions prior to 1.7.0.dev45 with exposed API endpoints lacking authentication controls. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 9.1 (Critical). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker discovers a Langflow instance, queries the unauthenticated API to dump all user conversations containing proprietary business data, API keys embedded in prompts, and sensitive customer information processed through AI workflows.
Remediation Update to Langflow 1.7.0.dev45 or later. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Identify all affected systems and apply vendor patches immediately. …

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CVE-2026-21445 vulnerability details – vuln.today
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