Hatchet is a platform for orchestrating background tasks, AI agents, and durable workflows at scale. Prior to 0.95.3, the V1 DurableTask stream handler stores worker-supplied task_external_id values in the durableInvocations routing map before tenant ownership is verified, and callback delivery resolves that map by task UUID without tenant identity. An authenticated tenant worker that knows another tenant's durable task UUID and keeps a stream open on the same dispatcher process can receive that task's durable callback result payload. UUIDv4 values are not enumerable, and single-tenant deployments are unaffected in practice. This issue is fixed in version 0.95.3.
History

Mon, 21 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 21 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
First Time appeared Hatchet-dev
Hatchet-dev hatchet
Vendors & Products Hatchet-dev
Hatchet-dev hatchet

Mon, 21 Sep 2026 16:00:00 +0000

Type Values Removed Values Added
Description Hatchet is a platform for orchestrating background tasks, AI agents, and durable workflows at scale. Prior to 0.95.3, the V1 DurableTask stream handler stores worker-supplied task_external_id values in the durableInvocations routing map before tenant ownership is verified, and callback delivery resolves that map by task UUID without tenant identity. An authenticated tenant worker that knows another tenant's durable task UUID and keeps a stream open on the same dispatcher process can receive that task's durable callback result payload. UUIDv4 values are not enumerable, and single-tenant deployments are unaffected in practice. This issue is fixed in version 0.95.3.
Title Hatchet: Cross-tenant durable callback payload disclosure in Hatchet V1 Dispatcher
Weaknesses CWE-639
CWE-862
References
Metrics cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-09-21T15:47:50.252Z

Updated: 2026-09-21T18:49:20.918Z

Reserved: 2026-09-01T16:17:43.078Z

Link: CVE-2026-84298

cve-icon Vulnrichment

Updated: 2026-09-21T18:49:11.197Z

cve-icon NVD

Status : Deferred

Published: 2026-09-21T16:17:24.803

Modified: 2026-09-23T18:26:49.087

Link: CVE-2026-84298

cve-icon Redhat

No data.