Vulnerability · Published Oct 28, 2026 · Assigned by GitHub_M
CVE-2026-82411Objects API: Cross-object-type authorization bypass on the object history-detail endpoint
Medium 6.5
In plain English
A medium-severity authorization bypass via user-controlled key in open-object from maykinmedia. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).
Official description
Open Object provides an API and admin interface to manage objects and object types. From 2.4.3 until 2.5.1, 3.6.2, 4.0.2, and 4.1.1, a token scoped to read one ObjectType can read the full versioned record of an object of any other ObjectType via the history-detail endpoint `GET /api/v2/objects/{uuid}/{index}`. The `history_detail` action in `src/objects/api/v2/views.py` calls `self.get_queryset()` and `get_object_or_404` directly instead of `self.get_object()`, so `check_object_permissions` and the per-object check in `ObjectTypeBasedPermission.has_object_permission` are not invoked. The queryset's `filter_for_token` applies only to the list and search actions, while `ObjectTypeBasedPermission.has_permission` allows non-create actions, leaving neither check to constrain history-detail records to the token's permitted ObjectType. The normal retrieve endpoint returns 403 for the same unauthorized object, and the sibling history action enforces the grant. Any valid non-superuser API token with a read grant on at least one ObjectType can therefore disclose another ObjectType's complete versioned object `data`, which can include citizen or case records and sensitive identifiers in government deployments. This issue is fixed in versions 2.5.1, 3.6.2, 4.0.2, and 4.1.1.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| maykinmedia | open-object | >= 2.4.3, < 2.5.1>= 3.0.0, < 3.6.2>= 4.0.0-rc.1, < 4.0.2>= 4.1.0, < 4.1.1 |
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
References
- https://github.com/maykinmedia/open-object/security/advisories/GHSA-55w6-rqp5-j5wx x_refsource_CONFIRM
- https://github.com/maykinmedia/open-object/commit/11c5b85ea5d1d80f940883f01b8b8ea80ccdd47c x_refsource_MISC
- https://github.com/maykinmedia/open-object/commit/27e806eff04c52ebe1e78126c288b63fc0308b52 x_refsource_MISC
- https://github.com/maykinmedia/open-object/commit/6154d9c2ed8c162b61f2d42db2de4eda5081347f x_refsource_MISC
- https://github.com/maykinmedia/open-object/commit/ce6b1820619c843748bc5231597aa7fc060d95fe x_refsource_MISC
- https://github.com/maykinmedia/open-object/tree/2.5.1 x_refsource_MISC
- https://github.com/maykinmedia/open-object/tree/3.6.2 x_refsource_MISC
- https://github.com/maykinmedia/open-object/tree/4.0.2 x_refsource_MISC
- https://github.com/maykinmedia/open-object/tree/4.1.1 x_refsource_MISC