Detections
Analytics
CVE-2021-29441
critical
Description
Nacos is a platform designed for dynamic service discovery and configuration and service management. In Nacos before version 1.4.1, when configured to use authentication (-Dnacos.core.auth.enabled=true) Nacos uses the AuthFilter servlet filter to enforce authentication. This filter has a backdoor that enables Nacos servers to bypass this filter and therefore skip authentication checks. This mechanism relies on the user-agent HTTP header so it can be easily spoofed. This issue may allow any user to carry out any administrative tasks on the Nacos server.
References
https://thehackernews.com/2026/07/exposed-hacker-server-reveals-wp.html
https://www.infosecurity-magazine.com/news/researchers-first-agentic/
https://www.securityweek.com/agentic-ai-used-to-conduct-ransomware-attack-via-langflow/