#VU124659 Code injection in Langflow - CVE-2026-33017
Published: March 27, 2026 / Updated: April 17, 2026
Vulnerability identifier: #VU124659
Vulnerability risk: Critical
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red
CVE-ID: CVE-2026-33017
CWE-ID: CWE-94
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerable software:
Langflow
Langflow
Software vendor:
Langflow
Langflow
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to improper input validation at the "/api/v1/build_public_tmp/{flow_id}/flow" endpoint. A remote attacker can send a specially crafted HTTP POST request to the application and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install updates from vendor's website.