8091
Couchbase Web Console
Critical RiskTCP — Database
Port Overview
Port Number
8091
Service Name
Couchbase Web Console
Transport Protocol
TCP
Category
Database
Security Risk
Critical
Port Range
Registered (1024-49151)
What is Port 8091?
Port 8091 is the primary administrative web console and REST API port for Couchbase Server, a high-performance distributed NoSQL database. Couchbase uses this port for cluster management, bucket configuration, and data operations. Exposed Couchbase ports have been exploited in numerous data breach incidents.
TCP
Database
Commonly Used
Security Considerations
Port 8091 (Couchbase Web Console) is classified as critical risk. This port should not be exposed to the public internet. The service transmits data without encryption, making it vulnerable to eavesdropping, credential theft, and man-in-the-middle attacks.
Recommendation: Block this port at the firewall. Use encrypted alternatives (SSH, SFTP, HTTPS) instead.