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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-84298
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-21 16:17:24 UTC
Updated2026-09-23 18:26:49 UTC
DescriptionHatchet 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.

Risk And Classification

Primary CVSS: v3.1 3.1 LOW from [email protected]

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

EPSS: 0.002430000 probability, percentile 0.137610000 (date 2026-09-24)

Problem Types: CWE-639 | CWE-862 | CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key | CWE-862 CWE-862: Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.1LOWCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED3.1LOWCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Hatchet-dev Hatchet affected < 0.95.3 Not specified

References

ReferenceSourceLinkTags
github.com/hatchet-dev/hatchet/security/advisories/GHSA-9q4h-f4x5-ffq8 [email protected] github.com
github.com/hatchet-dev/hatchet/commit/9555bfdd1e97f61d25e614ccaa107c5fb7... [email protected] github.com
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