Cybersecurity experts are sounding the alarm after a critical vulnerability in the Langflow visual framework, used for building AI agents, was found to be actively exploited by malicious actors. The Cybersecurity and Infrastructure Security Agency (CISA) has taken swift action, ordering US government agencies to prioritize patching the flaw as soon as possible.
The vulnerability, tracked as CVE-2026-0770, allows unauthenticated attackers to gain remote code execution as root with ease, making it a highly prized target for hackers. Trend Micro researchers who discovered the flaw explained that it exists in the way Langflow handles the exec_globals parameter provided to the validate endpoint. An attacker can exploit this weakness to execute malicious code in the context of root, giving them unfettered access to sensitive systems.
KEVIntel, a vulnerability intelligence company, has been tracking the exploitation attempts and reported over 220 instances from 64 unique source IP addresses before CISA added the flaw to its Known Exploited Vulnerabilities (KEV) catalog. KEVIntel’s founder, Ryan Dewhurst, noted that malicious activity targeting CVE-2026-0770 is not limited to simple vulnerability checks – attackers are also attempting to deploy malware and steal sensitive information such as AWS credentials, environment variables, and container metadata.
“This type of vulnerability is a frequent attack vector for malicious cyber actors and poses significant risks to the federal enterprise,” CISA warned in its directive. The agency has ordered US Federal Civilian Executive Branch (FCEB) agencies to secure their systems by Friday, as mandated by Binding Operational Directive (BOD) 26-04.
CISA’s swift action is a stark reminder of the importance of staying vigilant and up-to-date with security patches. This is not an isolated incident – CISA has flagged several Langflow vulnerabilities in recent years that have been exploited in the wild, including missing authentication security issues and code injection vulnerabilities. It’s clear that hackers are targeting this framework, and it’s essential for organizations using Langflow to take immediate action.
If you’re using Langflow, it’s crucial to investigate historical requests to the validate endpoint, review host activity, restrict access to the validation functionality, and rotate exposed credentials where successful execution cannot be ruled out. This vulnerability may not only put your systems at risk but also provide hackers with a foothold for further attacks. Don’t wait until it’s too late – test every layer of your security before attackers do, and stay one step ahead of the threat landscape.
Source: Bleeping Computer — 2026-07-22