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fleet/changes/fix-chart-api-only-enforcement
T
Sharon Katz f492a6a41d Enforce API-only endpoint restrictions on chart routes (#49477)
# Checklist for submitter

If some of the following don't apply, delete the relevant line.

- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/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.
- [x] Timeouts are implemented and retries are limited to avoid infinite
loops
- [x] If paths of existing endpoints are modified without backwards
compatibility, checked the frontend/CLI for any necessary changes

## Summary

Enforced API-only endpoint restrictions on chart endpoints, matching the
pattern already used by the activity bounded context. Also added
`RouteTemplateRequestFunc` to chart route server options so the
middleware can read the matched mux route template from context.

## Testing

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

### Reproduction

Created an API-only user with a restrictive endpoint allow-list (only
`GET /api/v1/fleet/hosts`). Confirmed that:
- Allowed endpoint (`/api/latest/fleet/hosts`) returns 200
- Non-allowed cataloged endpoint (`/api/latest/fleet/users`) returns 403
- Chart endpoint (`/api/latest/fleet/charts/uptime`) returned 200 before
the fix (the bug)
- After the fix, chart endpoint correctly returns 403

### Unit test

Added a test case in `server/service/middleware/auth/api_only_test.go`
that verifies an API-only user with endpoint restrictions is denied
access to chart endpoints not in their allow-list. The chart endpoint is
included in the test catalog (matching production), so the test
exercises the allow-list rejection path.

All 17 tests in the auth middleware package pass.

### Local verification

1. Confirmed the chart middleware in `cmd/fleet/serve.go` previously
called `auth.AuthenticatedUser(svc, next)` without
`APIOnlyEndpointCheck` wrapping
2. Verified the activity bounded context (same file) already uses
`auth.APIOnlyEndpointCheck(next)` as the correct pattern
3. Applied the same wrapping to the chart middleware
4. Added `RouteTemplateRequestFunc` to
`server/chart/internal/service/endpoint_utils.go` so the route template
is available in context (required by `APIOnlyEndpointCheck`)
5. Ran `go test ./server/service/middleware/auth/ -v` with all 17 tests
passing
6. Ran `make lint-go-incremental` with 0 issues
2026-07-23 10:44:13 -04:00

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Enforced API-only endpoint restrictions on chart endpoints.