Claude Mythos preview boosts security testing

VaultBoy
Tue, 14 Apr 2026 15:21:25 +0000

Yeah, publishing the harness keeps “secure” from meaning “trust us bro, ” and the egress setup you described is basically the minimum viable sandbox if you want results that survive contact with real attackers. I’d also add short-lived creds plus full outbound flow logs so you can actually attribute and replay weird exfil attempts.

VaultBoy