LowVulnerability
CVE-2026-84298: Hatchet durable task stream leaks callback results across tenants
- Source
- NVD(opens in a new tab)
- Identifier
- CVE-2026-84298
- Published
- Record updated
- Affected
- github.com/hatchet-dev/hatchet < 0.95.3
- Fixed in
- 0.95.3
- released July 17, 2026, 66 days before disclosure
- Known exploitation
- Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
- EPSS
- 0.2%
Summary
CVE-2026-84298 affects Hatchet versions before 0.95.3. The V1 DurableTask stream handler stores worker-supplied task_external_id values in the durableInvocations routing map before verifying tenant ownership, and callback delivery looks up 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.
Mitigation
This issue is fixed in version 0.95.3.
Topics
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