Following a request from the European Commission, EFSA was asked to deliver a scientific opinion on the safety and efficacy of Lentilactobacillus buchneri DSM 19455 as a technological feed additive for use in easy and moderately difficult to ensile fresh material for all animal species. The Panel concluded that L. buchneri DSM 19455 remains safe for all animal species, consumers and the environment under the authorised conditions of use. Regarding user safety, L. buchneri DSM 19455 was considered to be a respiratory sensitiser. The additive with inulin as a carrier tested is not irritant to skin and eyes. The Panel was not in the position to conclude on the skin sensitisation potential of the additive. There is no need for assessing the efficacy of the additive in the context of the renewal of the authorisation.