The alarm goes off. Someone needs access now, bypassing normal permissions. This is Mercurial Break-Glass Access.
Break-glass access is the controlled override of security rules in critical moments. In Mercurial, it means elevating privileges in a way that is fast, logged, and temporary. No lingering admin accounts. No forgotten tokens. Every access request is explicit and tracked.
A solid break-glass system has three parts: request, approval, expiration. The request should be minimal friction for emergencies. Approval must be clear, ideally from a designated security lead. Expiration is non-negotiable—access dies after the set window, with automatic revocation.
Mercurial implements break-glass flows using secure authentication, scoped permissions, and mandatory audit trails. The benefit is speed without chaos. The system enforces proper expiration while recording exactly who did what, when, and why. This reduces the risk of privilege creep and insider threats.