CVE-2026-84298: low-severity vulnerability in hatchet-dev hatchet
Hatchet: Cross-tenant durable callback payload disclosure in Hatchet V1 Dispatcher
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
8Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 3.1epss 0.2%
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.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Affected products
hatchet-dev · hatchetRelated CVEs — hatchet-dev hatchet
In the same product, most dangerous first.
CVE-2026-54746MEDIUMHatchet: Cross-tenant write/DoS to other tenants' workers via Dispatcher gRPC UpsertWorkerLabels and UnsubscribeEPSS 0.4%CVE-2026-108755MEDIUMHatchet through 0.110.5 Unauthenticated Memory Exhaustion via SNS Ingestion EndpointEPSS 0.3%CVE-2026-63342MEDIUMHatchet: Cross-Tenant Durable Task Event Log Disclosure via Missing Authorization CheckEPSS 0.3%CVE-2026-61681MEDIUMHatchet: SSRF via Unsigned UnsubscribeURL in SNS UnsubscribeConfirmation HandlerEPSS 0.3%CVE-2026-88978MEDIUMHatchet DurableTask WorkerStatus gRPC resolves caller-supplied durable-task UUIDs via ListSatisfiedEntries with no tenant_id filterEPSS 0.3%CVE-2026-42572MEDIUMHatchet: Cross-tenant information disclosure in `listTasksByDAGIds`EPSS 0.2%