Langflow <=1.2.x - Unauthenticated Remote Code Execution via validate_code

Langflow = 1.2.x exposes POST /api/v1/validate/code without any authentication. The endpoint calls validatecode which execs user-supplied Python code. Default-argument expressions in Python execute at function-definition time, allowing arbitrary OS command execution without authentication. id:...

CVE-2026-0770-PoC

CVE-2026-0770 - Langflow Remote Code Execution Summary Langflow contains a critical remote code execution vulnerability in the validatecode function located in src/lfx/src/lfx/custom/validate.py. The function uses exec to execute user-supplied Python code without sandboxing, allowing arbitrary...

CVE-2025-3248

CVE-2025-3248 Remote Code Execution using vulnerable API endpoint Proof of Concept. Info: ⚠️ Use this at your own risk! ❓ Added option to reverse shell. ✅ Auto retry if validatecode is off. Showcase Usage python CVE-2025-3248.py / python3 CVE-2025-3248.py Footprint By using this tool, you agree...

PYSEC-2026-4236 Langflow: Title Authenticated Remote Code Execution in validate_code via Malicious Decorators Description

Summary: A critical Authenticated Remote Code Execution RCE vulnerability exists in the validatecode function of Langflow. The /api/v1/validate/code endpoint, meant to validate user-supplied code, leverages Python's exec function. While it attempts to restrict execution to function definitions, i...

Langflow: Title Authenticated Remote Code Execution in validate_code via Malicious Decorators Description

Summary: A critical Authenticated Remote Code Execution RCE vulnerability exists in the validatecode function of Langflow. The /api/v1/validate/code endpoint, meant to validate user-supplied code, leverages Python's exec function. While it attempts to restrict execution to function definitions, i...

GHSA-W584-2H2R-2HVF Langflow: Title Authenticated Remote Code Execution in validate_code via Malicious Decorators Description

Summary: A critical Authenticated Remote Code Execution RCE vulnerability exists in the validatecode function of Langflow. The /api/v1/validate/code endpoint, meant to validate user-supplied code, leverages Python's exec function. While it attempts to restrict execution to function definitions, i...

Duplicate Advisory: Title Authenticated Remote Code Execution in validate_code via Malicious Decorators Description

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-w584-2h2r-2hvf. This link is maintained to preserve external references. Original Description langflow-ai langflow v1.9.3 is affected by: Code Injection. The impact is: execute arbitrary code remote. The compone...

Langflow auto_login + validate/code Chain Unauthenticated RCE (CVE-2026-9198) (Direct Check)

Binary data langflowautologinvalidatecodercecve20269198.nbin...

PYSEC-2026-1525 Langflow affected by Remote Code Execution via validate_code() exec()

Langflow execglobals Inclusion of Functionality from Untrusted Control Sphere Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Langflow. Authentication is not required to exploit this vulnerability. The specific...

GHSA-G22F-V6F7-2HRH Langflow affected by Remote Code Execution via validate_code() exec()

Langflow execglobals Inclusion of Functionality from Untrusted Control Sphere Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Langflow. Authentication is not required to exploit this vulnerability. The specific...