CVE-2026-27966: critical vulnerability in langflow-ai langflow
Langflow has Remote Code Execution in CSV Agent
Published · Updated
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55Vexday Risk Score
Patch soon. It has a working public exploit.
ssvc Attendcvss 9.8epss 35%
from disclosure to weaponsame day
Published on NVDFeb 26
metasploitFeb 25
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.8.0, the CSV Agent node in Langflow hardcodes `allow_dangerous_code=True`, which automatically exposes LangChain’s Python REPL tool (`python_repl_ast`). As a result, an attacker can execute arbitrary Python and OS commands on the server via prompt injection, leading to full Remote Code Execution (RCE). Version 1.8.0 fixes the issue.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
langflow-ai · langflowRelated CVEs — langflow-ai langflow
In the same product, most dangerous first.
CVE-2025-3248CRITICALLangflow < 1.3.0 Unauthenticated RCE via /api/v1/validate/codeEPSS 100.0%KEVCVE-2026-33017CRITICALLangflow has Unauthenticated Remote Code Execution via Public Flow Build EndpointEPSS 96.4%KEVCVE-2026-55255HIGHLangflow: IDOR Vulnerability in `/api/v1/responses` Endpoint Allows Authenticated Attackers to Access Another User's FlowEPSS 0.9%KEVCVE-2026-5027HIGHLangflow - Path Traversal Arbitrary File Write via upload_user_fileEPSS 40.0%CVE-2026-21445HIGHLangflow Missing Authentication on Critical API EndpointsEPSS 33.3%CVE-2026-33497HIGHLangflow: /profile_pictures/{folder_name}/{file_name} endpoint file readingEPSS 19.6%