Vulnerability · Published May 14, 2026 · Assigned by GitHub_M

CVE-2026-42572Hatchet: Cross-tenant information disclosure in `listTasksByDAGIds`

Medium 5.3

In plain English

A medium-severity authorization bypass via user-controlled key in hatchet from hatchet-dev. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.2%top 92.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/hatchet-dev/hatchet	0.83.39	GHSA-55gc-6fmc-fpx9
Go	github.com/hatchet-dev/hatchet	0.83.39	GO-2026-5134

Affected products (as reported)

Vendor	Product	Versions
hatchet-dev	hatchet	< 0.83.38

Weakness: CWE-639, CWE-863 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

References

https://github.com/hatchet-dev/hatchet/security/advisories/GHSA-55gc-6fmc-fpx9 x_refsource_CONFIRM