Flowise - RCE (CVE-2024-36420)

CVE-2024-36420 is a vulnerability in Flowise version 1.4.3 that allows attackers to exploit the /api/v1/openai-assistants-file endpoint for arbitrary file reading due to improper sanitization of user input. This flaw could enable remote attackers to access sensitive files on the server, potentially leading to information disclosure and further compromise of the affected system. No patches are currently available for this issue.

CrowdSec has been tracking this vulnerability and its exploits since 3rd of June 2026.

Insights from the CrowdSec network reveal that the attackers trying to exploit CVE-2024-36420 are composed of a fairly even mix of opportunistic and targeted actors. Some attackers employ preliminary reconnaissance, while others use indiscriminate scanning. CrowdSec data also reveals a clear uptick in attacks involving CVE-2024-36420 over the past week. Activity is above the usual baseline, suggesting growing attention from attackers. This may reflect rising awareness, recent exploit releases, or expanded targeting efforts.

Attackers exploit the /api/v1/openai-assistants-file endpoint by sending crafted POST requests with a fileName parameter containing path traversal sequences (e.g., ../../) to read arbitrary files from the server.