ACSC Warns of Targeting Campaign Against Australian Code Repositories

ACSC Warns of Targeting Campaign Against Australian Code Repositories

The Australian Cyber Security Centre has issued an urgent alert warning that threat actors are actively targeting online code repositories used by Australian developers and organisations. The campaign represents a significant supply chain risk that could compromise software deployed across Australian businesses and government agencies.

The ACSC’s warning, published on 1 April 2026, details how cybercriminals are gaining access to code repositories through multiple vectors including phishing attacks, vishing (voice phishing), social engineering, compromised credentials, and stolen tokens. Once inside, the threat actors are modifying code packages to introduce vulnerabilities and malicious code that propagates through software supply chains.

According to the ACSC, the threat actors are employing several techniques to exploit compromised repositories. They are modifying packages to introduce supply chain compromises, scanning repositories for secrets and credentials that can be used to access other systems, extracting and leaking credentials to enable further attacks, and migrating private repositories to public status to expose sensitive code and intellectual property.

The Australian Signals Directorate has previously warned that supply chain attacks represent one of the most significant cyber threats facing Australian organisations. By compromising code at its source, threat actors can distribute malicious software to thousands of downstream users who trust the integrity of their development dependencies. The ASD’s recent publications on software supply chain security have emphasised the need for developers to implement robust access controls, monitor for anomalous repository activity, and maintain strict separation between development and production environments.

The ACSC’s alert comes as Australian organisations continue to face sustained cyber espionage and criminal campaigns targeting intellectual property, customer data, and critical infrastructure. The warning follows recent high-profile incidents including the FIIG Securities penalty for cybersecurity failures and the ongoing pressure on Australian healthcare organisations from ransomware operators.

For Australian developers and organisations using online code repositories, the ACSC recommends implementing multi-factor authentication for all repository access, regularly auditing repository access logs for suspicious activity, scanning repositories for exposed secrets and credentials, implementing branch protection rules to prevent unauthorised code changes, and maintaining private repositories with strict access controls. The ACSC also advises organisations to verify the integrity of third-party dependencies through checksum validation and to maintain incident response plans specifically addressing supply chain compromises.

The ACSC’s 24/7 Cyber Security Hotline (1300 CYBER1) is available for organisations requiring assistance with securing their code repositories or responding to suspected compromises.