OpenStack Ironic before 39.0.1 sometimes allows a user to change the maintenance setting on a node via PATCH to /v1/nodes/{ident} - in other words, not using the specific maintenance endpoint.

{
                    "defaultStatus": "unaffected",
                    "product": "Ironic",
                    "vendor": "OpenStack",
                    "versions": [
                        {
                            "lessThan": "29.1.1",
                            "status": "affected",
                            "version": "17.0.0",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "32.1.1",
                            "status": "affected",
                            "version": "30.0.0",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "35.1.1",
                            "status": "affected",
                            "version": "33.0.0",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "39.0.1",
                            "status": "affected",
                            "version": "36.0.0",
                            "versionType": "semver"
                        }
                    ]
                }