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ID:12640 - Exploit for Code Injection in Langflow - CVE-2026-27966
ID:12640 - Exploit for Code Injection in Langflow - CVE-2026-27966
Published: April 24, 2026
Vulnerability identifier: #VU127533
Vulnerability risk: High
CVE-ID: CVE-2026-27966
CWE-ID: CWE-94
Exploitation vector: Remote access
Vulnerable software:
Langflow
Langflow
Link to public exploit:
Vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to improper control of code generation in the CSV Agent node when processing prompt input that reaches the exposed python_repl_ast tool. A remote attacker can send a specially crafted prompt to execute arbitrary code.
The issue is caused by allow_dangerous_code being hardcoded to true, which automatically exposes LangChain's Python REPL tool without a disable option.
Remediation
Install security update from vendor's website.