To the point: Microsoft locked down 73 infected GitHub repositories after the Miasma supply chain attack in under two minutes.
A supply chain attack designated Miasma led to the infection of Microsoft repositories on GitHub. Microsoft deactivated 73 compromised repositories within 105 seconds.
The Miasma supply chain attack targeted GitHub repositories and resulted in the infection of Azure-related repositories belonging to Microsoft. The affected accounts were locked with a notice of malware distribution.
Microsoft responded by locking down 73 infected repositories. This deactivation occurred within a time window of 105 seconds, indicating automated detection and response mechanisms.
The incident underscores the vulnerability of developer platforms to targeted supply chain attacks, in which attackers inject malware into software development via public code repositories. For CTOs, this signals an increased need to monitor code repository access, implement dependency scanning, and increase access restrictions for critical repositories.
Source: borncity.com · Published 6 June 2026
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