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fleet/changes/fix-undeletable-ddm-declarations.md
Rajendra Kadam b22a046a96 Fix undeletable Apple DDM declarations when allowed types change (#49810)
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**Related issue:** Resolves #47535

## Description

`DeleteMDMAppleDeclaration` re-ran the upload-time validator
(`ValidateUserProvided`) on the delete path. That validator enforces
*upload-admission* rules — forbidden declaration types
(`ForbiddenDeclTypes`) and the `AllowAllDeclarations` config flag — so
any declaration that was accepted at upload time became **undeletable**
through the API once the accepted set later shrank. Two ways this
happens in practice:

- A server config flag that had been enabled at upload time is later
disabled (the original customer report, prod 4.86.1).
- A declaration type is added to `ForbiddenDeclTypes` in a later
release, after declarations of that type were already uploaded.

In both cases the UI showed "Couldn't delete. Please try again." and the
API returned `400` with an upload-validation message on a *delete*
request.

Whether a declaration is Fleet-managed (and therefore protected from
deletion through this endpoint) is already determined by the Fleet
reserved-name check that runs immediately above the offending block.
This PR removes the upload-time validation from the delete path and
relies solely on that reserved-name check, so:

- A user can delete any declaration they previously uploaded, regardless
of whether the current validator config would still accept it on upload.
- Fleet-managed declarations (reserved names) remain protected from
deletion.

The `AllowAllDeclarations` flag and `ValidateUserProvided` are unchanged
on the **add/upload** path — admission control still happens where it
belongs.

## Testing

Extended `TestMDMConfigProfileCRUD` (replacing the pre-existing `//
TODO: Add tests for create/delete forbidden declaration types?`) with
two cases:

- A declaration whose type is in `ForbiddenDeclTypes` can be deleted
(regression guard — fails before this change, passes after).
- A declaration with a Fleet-reserved name remains protected from
deletion (guards the reserved-name check that is now the sole
Fleet-managed gate — a boundary that was previously untested).

Manually verified end-to-end in the UI: reproduced the stuck declaration
(upload a forbidden type with `FLEET_MDM_ALLOW_ALL_DECLARATIONS=true`,
restart without the flag), confirmed the pre-fix `400`, then confirmed
deletion succeeds after the fix with the flag off.

# Checklist for submitter

- [x] Changes file added for user-visible changes in `changes/`.
See [Changes
files](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/guides/committing-changes.md#changes-files)
for more information.
- [x] Input data is properly validated, `SELECT *` is avoided, SQL
injection is prevented (using placeholders for values in statements), JS
inline code is prevented especially for url redirects, and untrusted
data interpolated into shell scripts/commands is validated against shell
metacharacters.

## Testing

- [x] Added/updated automated tests
- [x] QA'd all new/changed functionality manually


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Bug Fixes**
* Improved Apple MDM declaration deletion to avoid re-running
upload-time validation during the delete flow.
* Declaration deletion checks now rely on Fleet management status and
reserved naming, preserving protection for Fleet-managed declarations.
* Added/adjusted deletion behavior for restricted and Fleet-reserved
declaration types.
* **Tests**
* Added regression coverage for Apple declaration profile deletion via
the configuration profile delete endpoint, including strict-mode
scenarios and cleanup behavior.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
2026-07-24 11:10:38 +05:30

292 B

  • Fixed a bug where an Apple configuration profile (DDM declaration) could become undeletable if the set of allowed declaration types changed after the profile was added (for example, when a server configuration flag was toggled). Deleting a profile no longer re-runs upload-time validation.