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CVE-2026-27966 - Vulnerability Analysis

CriticalCVSS: 9.8

Last Updated: February 26, 2026

Langflow - Remote Code Execution

Published: February 26, 2026Updated: February 26, 2026Remote Exploitable

Overview

Langflow < 1.8.0 contains a remote code execution caused by hardcoded allow_dangerous_code=True exposing LangChain's python_repl_ast tool, letting attackers execute arbitrary Python and OS commands via prompt injection.

Severity & Score

Severity: Critical

CVSS Score: 9.8

Impact

Attackers can execute arbitrary Python and OS commands on the server, leading to full remote code execution and system compromise.

Mitigation

Update to version 1.8.0 or later.

References

https://github.com/langflow-ai/langflow/commit/d8c6480daa17b2f2af0b5470cdf5c3d28dc9e508
https://github.com/langflow-ai/langflow/security/advisories/GHSA-3645-fxcv-hqr4

Related Resources

Vulnerability Intelligence Dashboard
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Details

CVE ID: CVE-2026-27966
Severity: Critical
CVSS Score: 9.8
Type: remote_code_execution
Status: new

CWE

CWE-94

CVSS Metrics

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