---
id: CVE-2026-51886
title: 'langflow-ai langflow v1.9.3 is affected by: Code Injection'
summary: >-
  langflow-ai langflow v1.9.3 is affected by: Code Injection. The impact is:
  execute arbitrary code (remote). The component is:
  src/backend/base/langflow/api/v1/validate.py:validate-post_validate_code-a-real-authenticated-http-post-to-api-…
severity: none
published: '2026-10-01'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T22:17:03.387'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-51886'
references:
  - url: 'https://gist.github.com/Ro1ME/c11b1e63e4e8fca6b25275144f25ec2a'
    label: cve@mitre.org
  - url: 'https://github.com/langflow-ai/langflow/issues/13336'
    label: cve@mitre.org
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-01T23:03:32.776Z'
---

## Overview

langflow-ai langflow v1.9.3 is affected by: Code Injection. The impact is: execute arbitrary code (remote). The component is: src/backend/base/langflow/api/v1/validate.py:validate-post_validate_code-a-real-authenticated-http-post-to-api-v1. The attack vector is: Attack surface: HTTP or browser-backed service path. A public-facing route accepts raw Python source and forwards it into a server-side compile/exec validation path without any visible entitlement guard. ¶¶ A weakness has been identified in langflow-ai langflow up to 1.9.3. langflow contains a code injection vulnerability in validate-post_validate_code-a-real-authenticated-http-post-to-api-v1 (src/backend/base/langflow/api/v1/validate.py:13). An authenticated attacker can execute arbitrary Python code on the server by submitting malicious code to the /api/v1/validate/code endpoint, which directly executes user-supplied code without sandboxing or security controls.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.