Critical 9.8Published Feb 25, 2026

CVE-2026-27966Langflow has Remote Code Execution in CSV Agent

Updated under an hour ago (Oct 27, 2026, 9:30 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for langflow-ai langflow

Exploited in the last 30 days

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: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-94
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Feb 27, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

langflow-ai langflow langflow_ai:langflow (from the name)	before 1.8.0	CNA record
langflow langflow langflow:langflow	before 1.8.0	NVD

References

References

https://github.com/langflow-ai/langflow/security/advisories/GHSA-3645-fxcv-hqr4	x-refsource-confirm, exploit, vendor-advisory
https://github.com/langflow-ai/langflow/commit/d8c6480daa17b2f2af0b5470cdf5c3d28dc9e508	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.