HashiCorp Vault 1.5 introduces Resource Quotas to protect against distributed denial of service (DDoS) attacks and ensure stability and resource consumption are predictable, allowing operators to control how applications request resources from Vault using rate limit quotas and lease count quotas. These features enable canceling requests over a set rate to maintain the overall health of Vault, protecting it from misbehaving applications that might saturate resources in the cluster through high request rates. Operations staff can monitor Resource Quotas using audit logging and enhanced telemetry metrics, such as quota.rate_limit.violation, quota.lease_count.violation, and quota.lease_count.max, to detect rate limit quota rule violations and ensure a healthy cluster for everyone else.