What is CVE-2026-88978?

CVE-2026-88978 is a medium-severity vulnerability in Hatchet-Dev Hatchet, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-09-21.

How severe is CVE-2026-88978?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Hatchet-Dev Hatchet

CVE-2026-88978

Hatchet is a platform for orchestrating background tasks, AI agents, and durable workflows at scale. Prior to 0.106.1, the WorkerStatus gRPC polling path in pkg/repository/durable_events.go passes caller-supplied durable task, node, and branch identifiers to ListSatisfiedEntries without a tenant filter, allowing an authenticated tenant worker that knows another tenant's durable-task UUID to retrieve matching durable event-log records. The UUIDv4 requirement makes exploitation unlikely, and single-tenant deployments are unaffected in practice. This issue is fixed in version 0.106.1.

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Hatchet-dev Hatchet — versions < 0.106.1

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-88978?: CVE-2026-88978 is a medium-severity vulnerability in Hatchet-Dev Hatchet, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-09-21.
How severe is CVE-2026-88978?: Medium severity. CVSS v3 base score is 4.3 out of 10.