Is CVE-2026-27966 actively exploited?

CVE-2026-27966 has no public evidence of in-the-wild exploitation as of 2026-02-28.

What is the CVSS score for CVE-2026-27966?

CVE-2026-27966 has a CVSS score of 9.8 (CRITICAL severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2026-27966?

Patch guidance is available from langflow security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-27966.

Fix CVE-2026-27966 - CRITICAL langflow langflow

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 Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-94 · Code Injection

Metadata

Primary Vendor: LANGFLOW
Published: 2/26/2026
Last Modified: 2/28/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2026-27966

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary