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Critical severity9.8NVD Advisory· Published Feb 26, 2026· Updated Jun 17, 2026

CVE-2026-27966

CVE-2026-27966

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
langflowPyPI
<= 1.8.0rc2—

Affected products

3
  • Langflow AI/Langflow2 versions
    cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*range: <1.8.0
    • (no CPE)range: < 1.8.0
  • ghsa-coords
    pkg:pypi/langflow
    Range: <= 1.8.0rc2

Patches

Vulnerability mechanics

References

4

News mentions

1