What is the CVSS score of CVE-2026-0771?

CVE-2026-0771 has a CVSS 3.0 base score of 7.1 (High). CVSS vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

How to fix or mitigate CVE-2026-0771?

Within 24 hours: Identify all Langflow instances in your environment and assess internet exposure; implement network segmentation to restrict access to trusted sources only. Within 7 days: Deploy WAF rules to block malicious PythonFunction payloads; disable the PythonFunction component if operationally feasible; conduct threat hunting for indicators of compromise. Within 30 days: Evaluate alternative workflow automation platforms; maintain continuous monitoring for vendor patch release; document all affected systems and risk acceptance decisions.

Langflow CVE-2026-0771

HIGH

Code Injection (CWE-94)

2026-01-23 zdi-disclosures@trendmicro.com

RCE Python Code Injection AI / ML Langflow

7.1

CVSS 3.0 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Authenticate to Langflow application
Exploit

Access Python function component
Execution

Inject malicious Python code into workflow
Impact

Execute arbitrary code in application context

Vulnerability Assessment

Weakness	CWE CWE-94 OWASP Top 10:2025 A05:2025 - Injection ASVS 5.0 V1 - Encoding and Sanitization Code injection prevention, sandbox exec MITRE ATT&CK 2 techniques across 2 tactics: Execution, Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	Langflow with PythonFunction component enabled. Requires authenticated user access (PR:L) and user interaction to create/execute workflows (UI:R). Exploitability depends on specific product configuration permitting custom Python code injection in workflow components.
Impact	CVSS 7.1 (HIGH). Attack vector: Network. Complexity: High. Privileges required: Low. User interaction: Required. Exploitable via remote/network.
Exploit ScenarioDerived	A remote attacker could exploit this vulnerability to execute arbitrary code on affected installations of Langflow.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.1% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Mar 12, 2026

Langflow's PythonFunction component allows authenticated attackers with user interaction to inject and execute arbitrary Python code within application workflows, achieving remote code execution. The vulnerability affects Langflow deployments using Python-based AI/ML components, with exploitation feasibility depending on specific product configurations. No patch is currently available.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:54 CVSS 7.1

Langflow PythonFunction Code Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Langflow. [CVSS 7.1 HIGH]

RemediationAI

Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Classified as CWE-94 (Code Injection). Affects the handling of Python component of Langflow. Langflow PythonFunction Code Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Langflow. Attack vectors and exploitability will vary depending on the configuration of the product.

The specific flaw exists within the handling of Python function components. Depending upon product configuration, an attacker may be able to introduce custom Python code into a workflow. An attacker can leverage this vulnera

Know when Langflow gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 7.1 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

Langflow PythonFunction Code Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Langflow. Attack vectors and exploitability will vary depending on the configuration of the product.

Executive ViewAI

Why It Matters

CVE-2026-0771 is a critical remote code execution vulnerability in Langflow that allows attackers to execute arbitrary code on affected systems with no available patch. Organizations using Langflow are at immediate risk of data breach, system compromise, and operational disruption until mitigation controls are deployed.

Business Impact: High

Compensating Controls

Implement Web Application Firewall (WAF) rules to detect and block PythonFunction code injection patterns; disable or restrict the PythonFunction component at application level if business requirements permit; enforce network segmentation to limit Langflow exposure to trusted internal networks only; implement strict input validation and output encoding on all user-supplied data; enable enhanced logging and monitoring for suspicious code execution attempts; require multi-factor authentication for administrative access; conduct regular vulnerability scanning of Langflow instances.

Threat Intelligence Overview

EPSS Score

0.1%

Top 69% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.1%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +36

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Code Injection CRITICAL

Code injection occurs when an application accepts user input and passes it directly into a language interpreter or evaluator without proper sanitization.

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.