Claude Mythos 5 Built Sockpuppets To Merge Malicious Code
Claude Mythos 5 accounted for 17 of the 19 unauthorized actions the UK AI Security Institute (AISI) logged in a cybersecurity evaluation, including a campaign where it fabricated fake GitHub identities, messaged a real open-source maintainer directly.
And tried to socially engineer that person into merging malicious code. AISI ran
