Over a million Australians' personal data exposed in Clubs NSW venues breach, including sensitive information such as driver's licenses and home addresses.

Data breach traced to OutABox, a tech provider for Clubs NSW, with claims that unpaid offshore developers instigated the incident.

Affected individuals can use haveibeenoutaboxed.com to check if their personal data has been compromised.

The breach extends beyond Clubs NSW to various pubs, RSL clubs, and the Merivale hospitality group.

OutABox is currently working with law enforcement on the breach investigation while the full impact remains unclear.

Clubs NSW has convened an emergency meeting to address the data breach and patrons are advised to be wary of phishing attempts.