CVE-2026-84298

Hatchet: Cross-tenant durable callback payload disclosure in Hatchet V1 Dispatcher

Published Sep 21, 2026 CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-9q4h-f4x5-ffq8 Hatchet: Cross-tenant durable callback payload disclosure in Hatchet V1 Dispatcher
History
Type Values Removed Values Added
Metrics ssvc

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

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Sep 21, 2026, 6:49 PM
Reserved
Sep 1, 2026, 4:17 PM
Status
Deferred
Published
Sep 21, 2026, 4:17 PM
Modified
Sep 23, 2026, 6:26 PM