CVE-2026-0770

The vulnerability results from improper handling of the exec_globals parameter passed to the validate endpoint. The application includes resources from an untrusted sphere of control (CWE-829), which allows an attacker to inject and execute malicious code. The exploit requires no authentication or user interaction — it is sufficient to send an appropriately crafted network request.

An attacker can execute arbitrary code in the context of the root user, which means complete takeover of the compromised system, including access to data, ability to install backdoors, and further lateral movement within the network.

Patches available from the vendor should be applied according to the references. Additionally, until the patch is deployed, it is recommended to restrict network access to the validate endpoint using firewall or access control mechanisms.

Langflow — versions indicated in the vendor's references and in the Zero Day Initiative advisory (ZDI-26-036)

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Langflow contains an inclusion of functionality from untrusted control sphere vulnerability that allows remote attackers to execute arbitrary code on affected installations.