New Malware Blocking Features Implemented in Composer 2.10 and Private Packagist

On June 26, 2026, Private Packagist announced enhancements to its malware blocking capabilities for Composer users, particularly those using version 2.10. The updates prevent the installation of flagged malware versions, addressing vulnerabilities in older Composer versions that could allow malware installation. Aikido's Intel feed now powers this malware blocking, enabling rapid response to threats. The integration ensures that even outdated Composer clients are protected from known malicious packages. The changes come in response to ongoing supply chain attacks affecting PHP developers and aim to improve overall security in the ecosystem. Organizations can now enforce Composer version restrictions to further mitigate risks. These updates are crucial as many developers and CI systems may still be using outdated Composer versions.

Key Points: • Private Packagist now blocks malware downloads for all Composer versions. • Aikido's Intel feed enhances malware detection and prevention in Composer 2.10. • Organizations can enforce Composer version restrictions to improve security.