Hatchet: Cross-Tenant Durable Task Event Log Disclosure via Missing Authorization Check

Summary

The GET /api/v1/stable/durable-tasks/{durable-task} endpoint (listDurableEventLog) is missing tenant authorization validation, allowing any authenticated user to read durable task event logs from any tenant.

Impact

This CVE requires the attacker to successfully guess the target UUID. Any authenticated Hatchet user can read durable task event logs from any other tenant, exposing:

• Task display names and workflow identifiers
• User messages (may contain sensitive business data)
• Wait conditions and branching logic
• Timing information