CVE-2026-63342

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

Published Sep 21, 2026 CVSS 3.1 · 6.3 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-g26x-m427-f48f Hatchet: Cross-Tenant Durable Task Event Log Disclosure via Missing Authorization Check
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 0.91.1, 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.
Title Hatchet: Cross-Tenant Durable Task Event Log Disclosure via Missing Authorization Check
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 6.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Sep 29, 2026, 3:02 PM
Reserved
Jul 16, 2026, 2:14 PM
Status
Deferred
Published
Sep 21, 2026, 4:17 PM
Modified
Sep 29, 2026, 3:17 PM