CVE-2026-63342 PUBLISHED

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

Assigner: GitHub_M
Reserved: 16.07.2026 Published: 21.09.2026 Updated: 21.09.2026

Hatchet is a platform for orchestrating background tasks, AI agents, and durable workflows at scale. Prior to 0.91.1, api-contracts/openapi/paths/v1/workflow-runs/workflow_run.yaml defines the GET /api/v1/stable/durable-tasks/{durable-task} endpoint implemented by listDurableEventLog without requiring the target tenant as a parent resource, allowing an authenticated user who obtains another tenant's durable task UUID to read that task's event log. Disclosed data can include task display names, workflow identifiers, user messages, wait conditions, branching logic, and timing information. This issue is fixed in version 0.91.1.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS Score: 6.3

Product Status

Vendor hatchet-dev
Product hatchet
Versions
  • Version < 0.91.1 is affected

References

Problem Types

  • CWE-863: Incorrect Authorization CWE