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CVE-2026-63342

6.3 MEDIUMpublic exploit available

Published 2026-09-21 · Updated 2026-09-21

AI risk analysis

Summary
The flaw allows an authenticated user to read another tenant's durable task event logs by exploiting a misconfigured API endpoint, potentially revealing sensitive workflow details.
Exploitability
Exploitation requires access to an authenticated session and knowledge of another tenant’s durable task UUID; moderate difficulty due to authentication requirement but ease in identifying target tasks.
Blast radius
If exploited, the impact could be significant as it compromises the privacy and security of workflows, including display names, user messages, and timing information across different tenants.
Prioritized remediation
Update to version 0.91.1 or apply a patch that properly enforces tenant scope checks on API endpoints.
auth-bypassapi-securitydata-exposureworkflows

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD 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.

CVSS vector

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

Weaknesses

CWE-863

Public exploit & PoC references

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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