Fixed Intel

CVE-2026-27966

Critical
CVSS 9.8PoC Available

Description

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 Score

9.8/ 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Classification (CWE)

CWE-94Code InjectionMITRE

Known Exploits

POC
https://github.com/langflow-ai/langflow/security/advisories/GHSA-3645-fxcv-hqr4exploit

Related Articles (1)

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References (2)

https://github.com/langflow-ai/langflow/commit/d8c6480daa17b2f2af0b5470cdf5c3d28dc9e508security-advisories@github.comhttps://github.com/langflow-ai/langflow/security/advisories/GHSA-3645-fxcv-hqr4security-advisories@github.com

Risk Assessment

HIGH
Known exploit
Critical CVSS

Details

Severity
Critical
CVSS
9.8
CWE
CWE-94
Exploit
POC
CISA KEV
No
Articles
1

Timeline

Published

Feb 26, 2026

External Links

NVD (NIST)CVE DetailsMITRE CVE