Tag: Proxy

Problems related to proxy configurations or usage

ID	Title	Description	Category	Technology	Tags
CRE-2025-0054 Medium Impact: 7/10 Mitigation: 5/10	NGINX upstream connection timeout	NGINX reports an upstream timeout error when it cannot establish or maintain a connection to backend services within the configured timeout threshold. This occurs when backend services are unresponsive, overloaded, or when the timeout values are set too low for normal operation conditions. The error indicates that NGINX attempted to proxy a request to an upstream server, but the connection or read operation timed out before completion.	Proxy Timeout Problems	nginx	Nginx Timeout Proxy Backend Issue Networking
CRE-2025-0055 Medium Impact: 8/10 Mitigation: 3/10	Nginx upstream buffer size too small	Nginx reports that an upstream server is sending headers that exceed the configured buffer size limits. This typically happens when the upstream application sends responses with large headers, cookies, or other header fields that don't fit in the default buffer allocation. When this occurs, Nginx cannot properly proxy the response to clients, resulting in HTTP errors.	Web Server Problems	nginx	Nginx Configuration Proxy Header Size Buffer