A single-lever mixing cartridge includes a head piece, which accommodates a bottom piece having at least one inflow channel and at least one outlet channel, and a disk control having a control disk that can be displaced via an at least pivotably mounted spindle relative to a passage disk which is arranged in a rotationally fixed manner. At least all inlet channels are provided with at least one lip seal for sealing the bottom piece against the passage disk and/or against a fitting receiving the cartridge.