Stolen Claude session cookies can reach corporate Gmail through grants no IT admin can revoke

From the source

Infostealers replayed stolen Claude session cookies into paid accounts without ever touching the login page two-factor authentication guards. The accounts Anthropic flagged were card-billed, self-serve accounts, which is the population no corporate identity provider governs, and no admin console can sign out. Session-cookie replay bypasses SSO as thoroughly as it bypasses 2FA. What SSO provides here is revocation and visibility, not prevention. The company disclosed the campaign in notification