Check Point Advisories

Langflow Arbitrary File Write (CVE-2026-33309)

Vulnerability
Protection

Check Point Reference:	CPAI-2026-8289
Date Published:	6 Jul 2026
Severity:	High
Last Updated:	Monday 06 July, 2026
Source:
Industry Reference:	CVE-2026-33309
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Langflow 1.2.0 and later, prior to 1.9.0
Vulnerability Description	A arbitrary file write vulnerability in Langflow allows authenticated attackers to write files anywhere on the host system, leading to remote code execution.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the Langflow Arbitrary File Write (CVE-2026-33309) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Web Server Enforcement Violation.
Attack Information: Langflow Arbitrary File Write (CVE-2026-33309)