CVE-2026-42572 Hatchet: Cross-tenant information disclosure in `listTasksByDAGIds`
Authenticated users can access task metadata from other tenants due to missing authorization checks on a specific API endpoint.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-42572?
CVE-2026-42572 is a medium-severity missing authorization vulnerability in hatchet-dev hatchet, published on 14 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Hatchet is a platform for orchestrating background tasks, AI agents, and durable workflows at scale. Prior to 0.83.39, a missing authorization directive on the GET /api/v1/stable/dags/tasks endpoint caused Hatchet's tenant-membership check to be skipped for this route. A user authenticated to any tenant on the same Hatchet instance could query the endpoint with another tenant's UUID and a DAG UUID belonging to that tenant, and receive task metadata for that DAG. This vulnerability is fixed in 0.83.39.
Which versions are affected by CVE-2026-42572?
3 open source packages ship an affected version, including github.com/hatchet-dev/hatchet. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/hatchet-dev/hatchet Go | All versions | 0.83.39 |
github.com/hatchet-dev/hatchet Go | All versions | 0.83.39 |
github.com/hatchet-dev/hatchet Go | All versions | 0.83.39 |
Products include Hatchet Hatchet.
How do I fix CVE-2026-42572?
Upgrade github.com/hatchet-dev/hatchet to 0.83.39 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-42572 being exploited?
There is no known exploitation of CVE-2026-42572 in the wild and no public exploit code.
Sources
Also known as GHSA-55gc-6fmc-fpx9, GO-2026-5134.