CVE-2026-27966 | THREATINT

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.

PUBLISHED Reserved 2026-02-25 | Published 2026-02-26 | Updated 2026-02-26 | Assigner GitHub_M

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

Problem types

CWE-94: Improper Control of Generation of Code ('Code Injection')

Product status

< 1.8.0

affected

References

github.com/...ngflow/security/advisories/GHSA-3645-fxcv-hqr4 exploit

github.com/...ngflow/security/advisories/GHSA-3645-fxcv-hqr4

github.com/...ommit/d8c6480daa17b2f2af0b5470cdf5c3d28dc9e508

cve.org (CVE-2026-27966)

nvd.nist.gov (CVE-2026-27966)

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